Class 10 Physics Chapter 6

Updated: 18 Dec 2023

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Class 10 Physics Chapter 6 introduces the concept of “Electromagnetism”. This is mainly chapter No. 15, “Electromagnetism”, of the book of Class 10.
This article consists of Notes, SLO Based Notes and MCQs of Physics, which cover your course, board papers and clear your Physics concept for different types of tests.

Class 10 Physics Chapter 6 Notes

Electromagnetism

Class 10 Physics Chapter No. 15 Notes

SLO Base Notes

Class 10 Physics Chapter 15 SLO Base Notes

Class 10 Physics Chapter 6 MCQs

1. What is the region around a magnet where magnetic effects can be observed called?
(a) Electric field
(b) Magnetic field
(c) Induction field
(d) Charge field

Magnetic field

2. How is the magnetic field represented?
(a) Epsilon (\varepsilon)
(b) Magnetic charge (q_M)
(c) Magnetic field vector (B)
(d) Electric induction vector (E)

Magnetic field vector (B)

3. When do charges exhibit magnetic behavior?
(a) Only at rest
(b) Only when moving
(c) Both at rest and when moving
(d) Neither at rest nor when moving

Only when moving

4. Stationary charges produce:
(a) Only electric fields
(b) Both electric and magnetic fields
(c) Only magnetic fields
(d) Neither electric nor magnetic fields

Only electric fields

5. Moving charges generate:
(a) Only electric fields
(b) Both electric and magnetic fields
(c) Only magnetic fields
(d) Neither electric nor magnetic fields

Both electric and magnetic fields

6. How can the magnetic field around a current-carrying wire be detected?
(a) Using a voltmeter
(b) Measuring electric potential
(c) Bringing a compass needle close
(d) Observing electric sparks

Bringing a compass needle close

7. When current passes through a long wire, how do compass needles around it align?
(a) In a straight line
(b) In a circular pattern
(c) In a random pattern
(d) In a square pattern

In a circular pattern

8. In the absence of current in the wire, how do compass needles align with Earth’s magnetic field?
(a) Parallel to the ground
(b) Pointing southward
(c) Pointing northward
(d) In a vertical position

Pointing northward

9. How does the compass needle deflect when the current is reversed in a wire?
(a) It remains unchanged
(b) It deflects in the same direction
(c) It deflects at a right angle
(d) It deflects in the opposite direction

It deflects in the opposite direction

10. What is used to determine the direction of the magnetic field around a current-carrying wire?
(a) Left-hand rule
(b) Right-hand rule I
(c) Left-foot rule
(d) Thumb rule

Right-hand rule I

11. According to Right-hand rule I, how are fingers positioned in relation to the magnetic field direction?
(a) Pointing away
(b) Pointing towards the wire
(c) Curled around the wire
(d) Extended straight

Curled around the wire

12. In Right-hand rule I, what does the thumb represent?
(a) Magnetic field direction
(b) Current direction
(c) Wire direction
(d) Compass needle direction

Current direction

13. How is Right-hand rule I modified for the direction of the magnetic field in electronic current flow?
(a) It remains the same
(b) Applied with the right hand
(c) Applied with the left hand
(d) None of these

Applied with the left hand

14. What happens when a steady current flows through a loop of wire?
(a) The magnetic field is absent
(b) The magnetic field forms a single pole
(c) The magnetic field forms both north and south poles
(d) The magnetic field only exists outside the coil

The magnetic field forms both north and south poles

15. Which hand rule is used to determine the direction of the magnetic field around a loop of wire carrying current?
(a) Left-hand rule l
(b) Right-hand rule ll
(c) Right-hand rule lll
(d) No rule is applicable

Right-hand rule ll

16. How does the arrangement of magnetic field lines inside a coil differ from outside?
(a) The field lines are weaker inside
(b) The field lines are absent inside
(c) The field lines are packed closer together inside
(d) The field lines are stronger outside

The field lines are packed closer together inside

17. Why is the magnetic field stronger inside the coil compared to outside?
(a) Due to absence of field lines inside
(b) The current is weaker inside
(c) The coil material enhances the magnetic field outside
(d) Field lines cannot cross, so they are packed closer inside

Field lines cannot cross, so they are packed closer inside

18. What shape is formed when a coil is shaped as a spiral (helix) to produce a magnetic field resembling that of a bar magnet?
(a) Circle
(b) Square
(c) Solenoid
(d) Triangle

Solenoid

19. What is the characteristic of the magnetic field produced by a solenoid when current passes through it?
(a) Strong outside, weak inside
(b) Uniform and strong along the solenoid’s axis
(c) Absent along the solenoid’s axis
(d) Circular and weak along the solenoid’s axis

Uniform and strong along the solenoid’s axis

20. In a tightly wound solenoid, how does the magnetic field inside compare to the exterior?
(a) Weaker and non-uniform inside
(b) Uniform and strong inside
(c) Circular and weak inside
(d) Non-existent inside

Uniform and strong inside

21. What is the role of Right-Hand Rule II in determining the direction of the magnetic poles of a solenoid?
(a) It determines the solenoid’s shape
(b) It establishes the strength of the magnetic field
(c) It helps determine the direction of the north pole
(d) It decides the amount of current flowing

It helps determine the direction of the north pole

22. According to Right-Hand Rule II, how should the fingers be oriented to determine the direction of the north pole in a solenoid?
(a) Pointing toward the current
(b) Cutting through the solenoid
(c) In the direction of the magnetic field lines
(d) Wrapped around the solenoid’s axis

Pointing toward the current

23. When using Right-Hand Rule II for a solenoid, if the fingers represent the direction of the current, what does the extended thumb indicate?
(a) Magnitude of current
(b) Direction of north pole
(c) Resistance of the solenoid
(d) Electric potential

Direction of north pole

24. If the current direction in a solenoid is reversed, how does Right-Hand Rule II predict the change in the direction of the north pole?
(a) The north pole remains unchanged
(b) The north pole reverses its direction
(c) The solenoid loses its north pole
(d) The north pole becomes weaker

The north pole reverses its direction

25. How is Right-hand rule Il modified for the direction of the magnetic field in electronic current flow?
(a) It remains the same
(b) Applied with the right hand
(c) Applied with the left hand
(d) None of these

Applied with the left hand

26. What happens when a current-carrying wire is placed in a magnetic field?
(a) The wire disintegrates
(b) Charges in the wire interact with the external magnetic field
(c) The wire becomes an insulator
(d) The magnetic field is absorbed by the wire

Charges in the wire interact with the external magnetic field

27. What is the direction of the force experienced by a current-carrying wire in a magnetic field?
(a) Parallel to the current
(b) Opposite to the direction of the current
(c) Perpendicular to both the current and the magnetic field
(d) Along the magnetic field lines

Perpendicular to both the current and the magnetic field

28. How does the force on a current-carrying wire change when the direction of the current is reversed?
(a) The force remains unchanged
(b) The force becomes weaker
(c) The force becomes stronger
(d) The force reverses its direction

The force reverses its direction

29. When is the force on the current-carrying wire maximum?
(a) When the wire is parallel to the magnetic field
(b) When the wire is at a 45-degree angle to the magnetic field
(c) When the wire is perpendicular to the magnetic field
(d) When the wire is anti-parallel to the magnetic field

When the wire is perpendicular to the magnetic field

30. When the current-carrying wire is parallel to the magnetic field, what happens to the force experienced by the wire?
(a) The force becomes maximum
(b) The force remains constant
(c) The force becomes zero
(d) The force reverses its direction

The force becomes zero

31. What factors is the force experienced by a current-carrying conductor in a magnetic field directly proportional to?
(a) Resistance and voltage
(b) Current, magnetic field strength, length of the wire, and sine of the angle
(c) Temperature and material composition
(d) Conductor diameter and color

Current, magnetic field strength, length of the wire, and sine of the angle

32. What is the SI unit for magnetic field strength (B)?
(a) Joule (J)
(b) Newton (N)
(c) Tesla (T)
(d) Ampere (A)

Tesla (T)

33. What is used to determine the direction of force on a current-carrying wire in a magnetic field?
(a) Right-hand rule I
(b) Left-hand rule
(c) Right-hand rule III or Fleming’s Left-hand rule
(d) Left-hand rule III or Fleming’s Right-hand rule

Right-hand rule III or Fleming’s Left-hand rule

34. At what angle does the magnetic force on a current-carrying conductor reach its maximum value?
(a) 0 degrees
(b) 45 degrees
(c) 180 degrees
(d) 90 degrees

90 degrees

35. If the current in the wire is doubled while the angle between the wire and the magnetic field remains constant, what happens to the magnetic force on the wire?
(a) The force becomes half
(b) The force doubles
(c) The force remains unchanged
(d) The force becomes zero

The force doubles

36. What happens to the magnetic force (F) when the length of the conductor (L) is doubled?
(a) F doubles
(b) F halves
(c) F remains unchanged
(d) F becomes zero

F doubles

37. If the magnetic field strength (B) is increased, how does it affect the magnetic force (F)?
(a) F increases
(b) F remains constant
(c) F decrease
(d) F becomes zero

F increases

38. Find the magnetic force (F) when a wire with B = 9 \ T, I = 1 \ A, L = 2 \ m \ and \ \theta = 90 \ degrees is subjected to a magnetic field.
(a) 2.07 N
(b) 18 N
(c) 4.5 N
(d) 5.2 N

18 N

39. A magnetic force of 30 N is exerted in a region where the magnetic field is 2 T and the current is 5 A. What is the length (L) of the conductor?
(a) 1.5 m
(b) 3 m
(c) 6 m
(d) 15 m

3 m

40. When a force of 80 N is experienced in a region with a current of 4 A and a length of 10 m, what is the magnetic field?
(a) 0.5 T
(b) 1 T
(c) 2 T
(d) 5 T

2 T

41. If a magnetic force of 120 N is exerted in a region with a length of 10 m and a magnetic field of 4 T, what is the current in the conductor?
(a) 3 A
(b) 4 A
(c) 8 A
(d) 20 A

3 A

42. According to Fleming’s left-hand rule, what does the extended thumb represent?
(a) Direction of current
(b) Direction of magnetic field
(c) Direction of magnetic force
(d) Magnitude of the force

Direction of magnetic force

43. In Fleming’s left-hand rule, which finger represents the direction of magnetic field?
(a) Thumb
(b) Index finger
(c) Middle finger
(d) Ring finger

Index finger

44. According to Fleming’s left-hand rule, what does the middle finger represent?
(a) Magnitude of the force
(b) Direction of magnetic field
(c) Direction of current
(d) Force exerted on the conductor

Direction of current

45. What happens when a current-carrying coil is placed in a uniform magnetic field?
(a) It experiences a net force
(b) It becomes insulating
(c) It generates heat
(d) It loses its magnetic properties

It experiences a net force

46. Which energy conversion takes place in a DC motor?
(a) Electrical to thermal
(b) Mechanical to electrical
(c) Electrical to mechanical
(d) Thermal to mechanical

Electrical to mechanical

47. What is the basic principle behind the operation of a DC motor?
(a) Heat generation in the coil
(b) Interaction of magnetic fields
(c) Rotation of the spindle
(d) None of these

Interaction of magnetic fields

48. Where can electric motors, including DC motors, be commonly found?
(a) Refrigerators
(b) Gas stoves
(c) Incandescent bulbs
(d) Wooden furniture

Refrigerators

49. Why does the coil in a DC motor experience a torque and start turning?
(a) Due to the force of gravity
(b) Interaction of current-carrying wire and a magnetic field
(c) Contact with the permanent magnet
(d) Random oscillations in the coil

Interaction of current-carrying wire and a magnetic field

50. What would happen if the direction of the current in the coil of a DC motor remained constant?
(a) The coil would not experience any force
(b) The torque would not change
(c) The coil would oscillate back and forth
(d) The motor would stop rotating

The coil would oscillate back and forth

51. How does the direction of the torque/couple acting on the coil change during rotation in a DC motor?
(a) It remains constant
(b) It reverses periodically
(c) It increases continuously
(d) It depends on the size of the coil

It reverses periodically

52. Why is the armature in a DC motor typically made of soft iron?
(a) To conduct electricity better
(b) To reduce the weight of the motor
(c) To amplify the magnetic field
(d) To resist magnetic effects

To amplify the magnetic field

53. In a DC motor, what happens if the armature is replaced with a non-magnetic material?
(a) The motor efficiency increases
(b) The motor would not function
(c) The torque acting on the coil decreases
(d) The direction of rotation changes

The motor would not function

54. Which part of the DC motor is responsible for converting electrical energy into mechanical energy?
(a) Coil
(b) Spindle
(c) Armature
(d) Permanent magnet

Armature

55. What is the consequence of increasing the number of turns in the coil of a DC motor?
(a) Decreased torque
(b) Increased electrical resistance
(c) Enhanced magnetic effects
(d) Reduced mechanical output

Enhanced magnetic effects

56. What is the purpose of the split ring in a DC motor?
(a) To generate electrical power
(b) To reverse the direction of the magnetic field
(c) To control the speed of rotation
(d) To facilitate continuous rotation of the coil

To facilitate continuous rotation of the coil

57. Why are the ends of the coil attached to the commutator in a DC motor?
(a) To provide mechanical support
(b) To maintain electrical contact
(c) To increase magnetic field strength
(d) To regulate the voltage

To maintain electrical contact

58. What role does the commutator play in the rotation of the coil in a DC motor?
(a) It controls the torque of the motor
(b) It adjusts the speed of rotation
(c) It reverses the direction of current in the coil
(d) It aligns with the magnetic field

It reverses the direction of current in the coil

59. How does the commutator contribute to continuous rotation in a DC motor?
(a) By changing the magnetic field polarity
(b) By reversing the direction of current at specific points
(c) By regulating the power supply voltage
(d) By synchronizing with external forces

By reversing the direction of current at specific points

60. What happens when the gaps in the commutator align with the brushes in a DC motor?
(a) Current starts flowing in the coil
(b) Current stops flowing in the coil
(c) The coil rotates counterclockwise
(d) The coil becomes stationary

Current stops flowing in the coil

61. What is the phenomenon called when a current is induced in a wire loop by a changing magnetic field?
(b) Magnetic Resonance
(c) Electromagnetic Induction
(d) Electric Conduction

Electromagnetic Induction

62. What induces an electromotive force (emf) in a wire?
(a) Static Magnetic Field
(b) Changing Magnetic Field
(c) Electric Charge
(d) Stationary Conductor

Changing Magnetic Field

63. What term is used to describe the current induced by a changing magnetic field in a circuit?
(a) Static Current
(b) Conduction Current
(c) Induced Current
(d) Battery Current

Induced Current

64. What happens to the galvanometer when a magnet is stationary inside the coil?
(a) Shows current in one direction
(b) Shows no current
(c) Shows current in the opposite direction
(d) Shows alternating current

Shows no current

65. What does a steady current in the primary coil produce?
(b) Alternating magnetic field
(c) No magnetic field

66. What effect does increasing the number of turns in a coil have on the induced electromotive force (e.m.f.)?
(a) No effect
(b) Decreases the e.m.f
(c) Increases the e.m.f
(d) Causes fluctuations in e.m.f

Increases the e.m.f

67. How does the speed of a conductor moving through a magnetic field relate to the induced e.m.f.?
(a) Speed has no effect on e.m.f
(b) Higher speed decreases e.m.f
(c) Higher speed increases e.m.f
(d) Speed causes random variations in e.m.f

Higher speed increases e.m.f

68. What is the relationship between the length of a conductor in a magnetic field and the induced e.m.f.?
(a) No correlation
(b) Longer length decreases e.m.f
(c) Length has an unpredictable effect on e.m.f
(d) Longer length increases e.m.f

Longer length increases e.m.f

69. How does the size of the magnetic field impact the induced e.m.f.?
(a) Magnetic field size is irrelevant
(b) Larger field decreases e.m.f
(c) Larger field increases e.m.f
(d) Magnetic field size causes oscillations in e.m.f

Larger field increases e.m.f

70. How does the induced magnetic field created by the loop relate to the external magnetic field during the process of pushing a bar magnet’s North pole into the loop?
(a) Same direction
(b) Opposite direction
(c) Perpendicular direction
(d) No relationship

Opposite direction

71. What happens to the energy spent in overcoming the opposition of the induced magnetic field during the motion of the magnet?
(a) Converted into electrical energy
(b) Lost as heat
(c) Converted into mechanical energy
(d) No energy transformation occurs

Converted into electrical energy

72. What is the primary function of an electricity generator?
(a) Converts electrical energy into mechanical energy
(b) Converts mechanical energy into electrical energy
(c) Stores electrical energy
(d) Produces magnetic fields

Converts mechanical energy into electrical energy

73. Which principle is employed in the generation of electricity by a generator?
(a) Ohm’s Law
(b) Faraday’s Law of Electromagnetic Induction
(c) Newton’s Law of Motion
(d) Coulomb’s Law

74. In an AC generator, what type of energy is initially converted into electrical energy?
(a) Thermal energy
(b) Nuclear energy
(c) Mechanical energy
(d) Chemical energy

Mechanical energy

75. How is the generation of direct current (DC) achieved in a generator?
(a) By using slip rings and brushes
(b) By employing a commutator (split ring)
(c) By rotating the coil in a static magnetic field
(d) By utilizing a permanent magnet

By employing a commutator (split ring)

76. What modification is required to produce alternating current (AC) in a generator?
(a) Adding more coils to the rotor
(b) Using a stronger permanent magnet
(c) Replacing the rotor with a stator
(d) Employing slip rings and brushes

Employing slip rings and brushes

77. In an AC generator, what component is responsible for changing the direction of induced current continuously?
(a) Rotor shaft
(b) Commutator
(c) Permanent magnet
(d) Slip rings

Slip rings

78. What type of current does a DC generator produce?
(a) Alternating current (AC)
(b) Pulsating current
(c) Direct current (DC)
(d) Oscillating current

Direct current (DC)

79. What is the phenomenon described as the induction of electromotive force (emf) in one circuit or coil due to the change in current in another circuit or coil?
(a) Self-induction
(b) Mutual induction
(c) Electromagnetic induction

Mutual induction

80. In mutual induction, what is the role of the coil connected to a battery?
(a) Secondary coil
(b) Tertiary coil
(c) Primary coil
(d) Inductive coil

Primary coil

81. What is the purpose of the iron core in the mutual induction setup?
(a) Increases electrical resistance
(b) Decreases magnetic field
(c) Enhances the magnetic field
(d) Isolates the coils

Enhances the magnetic field

82. Which term is used for the coil that has no source of electromotive force (emf) in mutual induction?
(a) Primary coil
(b) Tertiary coil
(c) Secondary coil
(d) Passive coil

Secondary coil

83. What is the mathematical expression for the induced emf in the secondary coil (E_s) in terms of mutual induction (M) and the rate of change of current in the primary coil (\frac{\Delta I}{\Delta t}) ?
(a) E_s = \frac{L \Delta I}{ \Delta t}
(b) E_s = - L \frac{\Delta I}{\Delta t}
(c) E_s = M \frac{\Delta I}{\Delta t}
(d) E_s = -M \frac{\Delta I}{\Delta t}

E_s = -M \frac{\Delta I}{\Delta t}

84. What is the unit of mutual induction?
(a) Volt (V)
(b) Ampere (A)
(c) Henry (H)
(d) Second (s)

Henry (H)

85. How is 1 Henry defined in terms of electrical quantities?
(a) 1 H = 1 V.s / 1 A
(b) 1 H = 1 W / 1 C
(c) 1 H = 1 J / 1 C
(d) 1 H = 1 V × 1 s

1 H = 1 V.s / 1 A

86. If the coefficient of mutual induction is doubled while the rate of change of current in the primary remains constant, what happens to the induced emf in the secondary coil?
(a) It doubles
(b) It halves
(c) It remains the same
(d) It becomes zero

It doubles

87. If the current is changing at the rate of 2 amperes per second in the primary coil, what would be the magnitude of induced emf in the secondary coil if the coefficient of mutual induction is 0.5 H?
(a) 1 V
(b) 0.5 V
(c) 2 V
(d) 4 V

1 V

88. If the induced emf (E_s) is 4 V, the change in time (\Delta t) \ is \ 2 \ s , and the mutual induction (M) is 4 H, what is the change in current (\Delta I) ?
(a) -2 \ A
(b) -6 \ A
(c) 6 \ A
(d) 2 \ A

-2 \ A

89. If the induced emf (E_s) is 10 V, the change in current ( \Delta I) \ is \ -3 \ A , and the mutual induction (M) is 5 H, what is the change in time (\Delta t) ?
(a) -2 s
(b) 2 s
(c) -1.5 s
(d) 1.5 s

1.5 s

90. If the induced emf (Es) is 12 V, the change in current (\Delta I) \ is \ -4 \ A , and the change in time (\Delta y) \ is \ 3 \ s , what is the mutual induction (M) between the coils?
(a) -9 \ H
(b) 9 \ H
(c) -4 \ H
(d) 4 \ H

9 \ H

91. What is the primary function of a transformer?
(a) Generate DC voltage
(b) Store electrical energy
(c) Increase or decrease AC voltage or current
(d) Convert mechanical energy to electrical energy

Increase or decrease AC voltage or current

92. What is the underlying principle of a transformer?
(b) Mutual induction
(c) Self-Induction
(d) Ohm’s Law

Mutual induction

93. What are the key components of a transformer?
(a) Diodes and resistors
(b) Capacitors and inductors
(c) Two coils or windings and a core
(d) Transistors and relays

Two coils or windings and a core

94. What is the purpose of the core in a transformer?
(a) To enhance resistance
(b) To provide electrical insulation
(c) To store electrical charge
(d) To maximize mutual inductance

To maximize mutual inductance

95. Which type of current is primarily involved in the operation of a transformer?
(a) Direct Current (DC)
(b) Alternating Current (AC)
(c) Pulsating Current

Alternating Current (AC)

96. What is the winding from which power is supplied called in a transformer?
(a) Primary
(b) Secondary
(c) Tertiary
(d) Auxiliary

Primary

97. What is the winding from which power is drawn called in a transformer?
(a) Primary
(b) Secondary
(c) Tertiary
(d) Auxiliary

Secondary

98. In a step-up transformer, which coil has more turns?
(a) Primary coil
(b) Secondary coil
(c) Both have the same number of turns
(d) It depends on the specific transformer

Secondary coil

99. In a step-down transformer, which coil has more turns?
(a) Primary coil
(b) Secondary coil
(c) Both have the same number of turns
(d) It depends on the specific transformer

Primary coil

100. If the turns ratio (N_s / N_p) is greater than 1, what type of transformer is it?
(a) Step-up transformer
(b) Step-down transformer
(c) Isolation transformer
(d) Autotransformer

Step-up transformer

101. If the turns ratio (\frac{N_s}{N_p}) is less than 1, what type of transformer is it?
(a) Step-up transformer
(b) Step-down transformer
(c) Isolation transformer
(d) Autotransformer

Step-down transformer

102. What is the relationship between the secondary (output) voltage (V_2) and primary (input) voltage (V_1) in a step-up transformer?
(a) V_2 = V_1
(b) V_2 < V_1
(c) V_2 > V_1
(d) V_2 is unrelated to V_1

V_2 > V_1

103. What is the relationship between the secondary (output) voltage (V_2) and primary (input) voltage (V_1) in a step-down transformer?
(a) V_2 = V_1
(b) V_2 < V_1
(c) V_2 > V_1
(d) V_2 is unrelated to V_1

V_2 < V_1

104. For a step-down transformer with a turns ratio of 1:3 , what can be concluded about the secondary voltage compared to the primary voltage?
(a) V_2 = V_1
(b) V_2 > V_1
(c) V_2 < V_1
(d) V_2 is unrelated to V_1

V_2 < V_1

105. If the turns ratio is 2:1 , what type of transformer is it?
(a) Step-up transformer
(b) Step-down transformer
(c) Isolation transformer
(d) Autotransformer

Step-up transformer

106. If the turns ratio is 1:2 , what type of transformer is it?
(a) Step-up transformer
(b) Step-down transformer
(c) Isolation transformer
(d) Autotransformer

Step-down transformer

107. How is the turns ratio related to the number of turns in the primary (N_1) and secondary (N_2) coils?
(a) N_1 \times N_2
(b) \frac{N_1}{N_2}
(c) \frac{N_2}{N_1}
(d) None of these

\frac{N_2}{N_1}

108. What is the primary purpose of transformers?
(a) To increase power loss
(b) To reduce voltage levels
(c) To enhance resistive heating
(d) To efficiently transmit electricity over long distances

To efficiently transmit electricity over long distances

109. What is the final voltage before domestic use?
(a) 13,000 V
(b) 500,000 V
(c) 11,000 V
(d) 240 V

240 V

110. A transformer has 500 turns in its primary winding and 2500 turns in its secondary winding. If the primary voltage is 120V, what is the secondary voltage?
(a) 24V
(b) 240V
(c) 600V
(d) 720V

600V

111. A transformer has a turns ratio of 1:10 . If the primary voltage is 80V, what is the secondary voltage?
(a) 8V
(b) 40V
(c) 80V
(d) 800V

8V

112. If a transformer has 600 turns in its primary winding and 300 turns in its secondary winding, and the primary voltage is 240V, what is the secondary voltage?
(a) 120V
(b) 240V
(c) 480V
(d) 960V

120V

113. The turns ratio of a transformer is 1:5 , and the secondary voltage is 200V. What is the primary voltage?
(a) 400V
(b) 500V
(c) 1000V
(d) 2000V

1000V

114. A transformer has a turns ratio of 1:8 . If the secondary voltage is 320V, what is the primary voltage?
(a) 140V
(b) 880V
(c) 1160V
(d) 2560V

2560V

115. If a transformer has 1200 turns in its primary winding and 150 turns in its secondary winding, and the primary voltage is 240V, what is the secondary voltage?
(a) 18V
(b) 30V
(c) 300V
(d) 500V