Electricity and Magnetism MCQs with Answers | 100 Physics Multiple Choice Questions

Practice 100 Electricity and Magnetism MCQs with answers covering electric current, resistance, Ohm’s law, magnetic fields, electromagnets, and electromagnetic induction. Perfect for exams and quick revision.

Electricity and Magnetism are fundamental branches of physics that explain how electric charges move, how magnetic fields are produced, and how these forces power modern technology. This comprehensive set of 100 Electricity and Magnetism MCQs with answers covers essential topics such as electric current, resistance, Ohm’s law, electric power, magnetic fields, electromagnets, electric motors, and electromagnetic induction. Designed for Class 7 to Class 10 students, these multiple choice questions are ideal for exam preparation, competitive tests, and concept revision, helping learners strengthen their understanding through clear, objective-based practice.

Below are 100 Multiple Choice Questions (MCQs) on Electricity and Magnetism, written in clear English, suitable for school exams, competitive tests, and quick revision.
Each question has four options and the correct answer is provided.

Electricity and Magnetism – 100 MCQs

Electricity (1–60)

1. Electric current is the flow of:
   A) Neutrons
   B) Protons
   C) Electrons
   D) Atoms
   Answer: C

2. SI unit of electric current is:
   A) Volt
   B) Ampere
   C) Ohm
   D) Watt
   Answer: B

3. The device used to measure electric current is:
   A) Voltmeter
   B) Ammeter
   C) Galvanometer
   D) Ohmmeter
   Answer: B

4. SI unit of electric charge is:
   A) Ampere
   B) Coulomb
   C) Volt
   D) Ohm
   Answer: B

5. One coulomb is equal to:
   A) Charge on one electron
   B) Charge on 10⁶ electrons
   C) Charge flowing in 1 second at 1 ampere
   D) Energy per second
   Answer: C

6. The SI unit of electric potential difference is:
   A) Ohm
   B) Watt
   C) Volt
   D) Ampere
   Answer: C

7. The instrument used to measure voltage is:
   A) Ammeter
   B) Voltmeter
   C) Galvanometer
   D) Rheostat
   Answer: B

8. Electric resistance depends on:
   A) Length
   B) Area
   C) Material
   D) All of these
   Answer: D

9. SI unit of resistance is:
   A) Volt
   B) Ampere
   C) Ohm
   D) Watt
   Answer: C

10. Ohm’s law relates:
    A) Power and time
    B) Voltage, current, resistance
    C) Energy and power
    D) Charge and mass
    Answer: B

11. Ohm’s law formula is:
    A) V = IR
    B) P = VI
    C) E = mc²
    D) Q = It
    Answer: A

12. Resistance increases if the length of a wire:
    A) Decreases
    B) Remains same
    C) Increases
    D) Becomes zero
    Answer: C

13. A good conductor of electricity is:
    A) Rubber
    B) Plastic
    C) Copper
    D) Glass
    Answer: C

14. An insulator is:
    A) Copper
    B) Aluminum
    C) Rubber
    D) Iron
    Answer: C

15. The flow of charges in a closed circuit is called:
    A) Voltage
    B) Resistance
    C) Current
    D) Power
    Answer: C

16. Electric power is measured in:
    A) Joule
    B) Watt
    C) Volt
    D) Ohm
    Answer: B

17. Formula for electric power is:
    A) P = VI
    B) P = IR
    C) P = V/R
    D) P = I/R
    Answer: A

18. Electric energy is measured in:
    A) Watt
    B) Joule
    C) Ampere
    D) Volt
    Answer: B

19. Commercial unit of electrical energy is:
    A) Joule
    B) Watt
    C) kWh
    D) Volt
    Answer: C

20. One kilowatt-hour equals:
    A) 100 J
    B) 1000 J
    C) 3.6 × 10⁶ J
    D) 360 J
    Answer: C

21. Heating effect of electric current was studied by:
    A) Ohm
    B) Joule
    C) Faraday
    D) Maxwell
    Answer: B

22. Joule’s law of heating is:
    A) H ∝ I²Rt
    B) H ∝ VIt
    C) H ∝ IR
    D) H ∝ V²R
    Answer: A

23. Fuse wire is made of:
    A) Copper
    B) Aluminum
    C) Tin-lead alloy
    D) Iron
    Answer: C

24. A fuse is connected in:
    A) Parallel
    B) Series
    C) Mixed
    D) Earth wire
    Answer: B

25. Electric bulbs use:
    A) Copper filament
    B) Iron filament
    C) Tungsten filament
    D) Aluminum filament
    Answer: C

26. A short circuit occurs when:
    A) Resistance increases
    B) Current decreases
    C) Live and neutral wires touch
    D) Voltage becomes zero
    Answer: C

27. Overloading causes:
    A) Decrease in current
    B) Heating of wires
    C) Less resistance
    D) No effect
    Answer: B

28. Conventional current flows from:
    A) Negative to positive
    B) Positive to negative
    C) Randomly
    D) Earth to wire
    Answer: B

29. A battery converts:
    A) Mechanical to electrical energy
    B) Chemical to electrical energy
    C) Electrical to mechanical energy
    D) Heat to electrical energy
    Answer: B

30. Resistance of an ideal conductor is:
    A) High
    B) Low
    C) Zero
    D) Infinite
    Answer: C

31. Resistance decreases when temperature of a metal:
    A) Increases
    B) Decreases
    C) Remains same
    D) Becomes zero
    Answer: B

32. A resistor connected in series:
    A) Increases current
    B) Decreases resistance
    C) Increases total resistance
    D) Has same voltage
    Answer: C

33. In a parallel circuit, voltage across each component is:
    A) Different
    B) Zero
    C) Same
    D) Infinite
    Answer: C

34. The path of electric current must be:
    A) Open
    B) Closed
    C) Broken
    D) Insulated
    Answer: B

35. The device used to control current is:
    A) Voltmeter
    B) Rheostat
    C) Fuse
    D) Battery
    Answer: B

36. Electric current produces:
    A) Heat only
    B) Magnetic effect
    C) Chemical effect
    D) All of these
    Answer: D

37. Lightning is a form of:
    A) Magnetic discharge
    B) Electric discharge
    C) Heat radiation
    D) Sound wave
    Answer: B

38. Static electricity is produced by:
    A) Heating
    B) Rubbing
    C) Cooling
    D) Melting
    Answer: B

39. The earth wire is used for:
    A) Lighting
    B) Safety
    C) Heating
    D) Decoration
    Answer: B

40. Higher resistance causes current to:
    A) Increase
    B) Decrease
    C) Remain same
    D) Become zero
    Answer: B

Magnetism (61–100)

61. A magnet has:
    A) One pole
    B) Two poles
    C) Three poles
    D) No poles
    Answer: B

62. Like magnetic poles:
    A) Attract
    B) Repel
    C) Neutralize
    D) Destroy
    Answer: B

63. Unlike magnetic poles:
    A) Repel
    B) Ignore
    C) Attract
    D) Disappear
    Answer: C

64. The ends of a magnet are called:
    A) Charges
    B) Edges
    C) Poles
    D) Centers
    Answer: C

65. SI unit of magnetic field is:
    A) Tesla
    B) Weber
    C) Ampere
    D) Gauss
    Answer: A

66. The device used to detect magnetic field is:
    A) Ammeter
    B) Compass
    C) Voltmeter
    D) Barometer
    Answer: B

67. Magnetic field lines:
    A) Cross each other
    B) Are straight
    C) Never intersect
    D) End at poles
    Answer: C

68. Magnetic field is strongest at:
    A) Center
    B) Middle
    C) Poles
    D) Edges
    Answer: C

69. The region around a magnet where force is felt is called:
    A) Magnetic area
    B) Magnetic field
    C) Magnetic zone
    D) Magnetic energy
    Answer: B

70. Earth behaves like a:
    A) Electric dipole
    B) Bar magnet
    C) Iron rod
    D) Battery
    Answer: B

71. A compass needle is a:
    A) Iron piece
    B) Magnetic needle
    C) Steel wire
    D) Copper strip
    Answer: B

72. Magnetic materials include:
    A) Copper
    B) Plastic
    C) Iron
    D) Wood
    Answer: C

73. Non-magnetic material is:
    A) Iron
    B) Nickel
    C) Steel
    D) Plastic
    Answer: D

74. The process of making a magnet is called:
    A) Insulation
    B) Magnetization
    C) Electrification
    D) Polarization
    Answer: B

75. Cutting a magnet into two pieces results in:
    A) One magnet
    B) Two magnets
    C) Loss of magnetism
    D) One pole
    Answer: B

76. Magnetic field around a current-carrying conductor was discovered by:
    A) Faraday
    B) Maxwell
    C) Oersted
    D) Newton
    Answer: C

77. An electromagnet is formed by:
    A) Permanent magnet
    B) Current-carrying coil
    C) Steel rod
    D) Plastic wire
    Answer: B

78. Strength of an electromagnet can be increased by:
    A) Reducing current
    B) Using air core
    C) Increasing current
    D) Cutting wire
    Answer: C

79. Electromagnets are used in:
    A) Cranes
    B) Fans
    C) Bulbs
    D) Switches
    Answer: A

80. Permanent magnets are usually made of:
    A) Soft iron
    B) Steel
    C) Copper
    D) Aluminum
    Answer: B

81. Soft iron is used in electromagnets because:
    A) It is expensive
    B) It magnetizes easily
    C) It is light
    D) It is colorful
    Answer: B

82. Magnetic field lines emerge from:
    A) South pole
    B) North pole
    C) Both poles
    D) Center
    Answer: B

83. Magnetic field lines enter:
    A) North pole
    B) South pole
    C) Center
    D) Air
    Answer: B

84. The SI unit of magnetic flux is:
    A) Tesla
    B) Weber
    C) Ampere
    D) Henry
    Answer: B

85. A current-carrying wire behaves like:
    A) Resistor
    B) Magnet
    C) Battery
    D) Fuse
    Answer: B

86. Fleming’s right-hand rule is used for:
    A) Heating effect
    B) Direction of force
    C) Direction of current induced
    D) Electric power
    Answer: C

87. Fleming’s left-hand rule is used for:
    A) Electric current
    B) Magnetic field
    C) Direction of force on conductor
    D) Resistance
    Answer: C

88. Magnetic field inside a solenoid is:
    A) Zero
    B) Weak
    C) Uniform
    D) Random
    Answer: C

89. A solenoid acts like:
    A) Battery
    B) Resistor
    C) Bar magnet
    D) Capacitor
    Answer: C

90. Increasing number of turns in a coil:
    A) Decreases magnetism
    B) No effect
    C) Increases magnetism
    D) Removes field
    Answer: C

91. The force on a moving charge in magnetic field is:
    A) Electric force
    B) Gravitational force
    C) Magnetic force
    D) Nuclear force
    Answer: C

92. Magnetic effect of current is used in:
    A) Heater
    B) Electric motor
    C) Electric iron
    D) Fuse
    Answer: B

93. Electric motor converts:
    A) Electrical to mechanical energy
    B) Mechanical to electrical energy
    C) Heat to electrical energy
    D) Chemical to heat energy
    Answer: A

94. Generator works on the principle of:
    A) Heating effect
    B) Chemical effect
    C) Electromagnetic induction
    D) Static electricity
    Answer: C

95. Magnetic levitation uses:
    A) Gravity
    B) Friction
    C) Magnetic force
    D) Heat
    Answer: C

96. The strength of magnetic field depends on:
    A) Current
    B) Distance
    C) Medium
    D) All of these
    Answer: D

97. A magnet attracts:
    A) All metals
    B) Only iron
    C) Magnetic materials
    D) All objects
    Answer: C

98. Magnetic poles always exist in:
    A) Pairs
    B) Singles
    C) Triples
    D) Groups
    Answer: A

99. Demagnetization can be done by:
    A) Heating
    B) Hammering
    C) Passing AC
    D) All of these
    Answer: D

100. The phenomenon of producing current by changing magnetic field is called:
     A) Magnetization
     B) Electromagnetic induction
     C) Electric conduction
     D) Polarization
     Answer: B