{"id":12680,"date":"2025-09-20T08:18:42","date_gmt":"2025-09-20T07:18:42","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=12680"},"modified":"2025-11-10T05:56:08","modified_gmt":"2025-11-10T05:56:08","slug":"electromagnetism-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/09\/20\/electromagnetism-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Electromagnetism Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n

1. The study of electric current and magnetic fields together is called<\/mark><\/strong>
A) Electromagnetism
B) Magnetism
C) Electrostatics
D) Electrochemistry
Answer:<\/strong> A) Electromagnetism
Explanation:<\/strong> Electromagnetism deals with the interaction between electricity and magnetism.<\/p>\n\n\n\n

2. The scientist who discovered the magnetic effect of electric current is<\/mark><\/strong>
A) Oersted
B) Faraday
C) Maxwell
D) Ampere
Answer:<\/strong> A) Oersted
Explanation:<\/strong> Oersted discovered that current in a wire produces a magnetic field around it.<\/p>\n\n\n\n

3. The magnetic field around a current-carrying wire is in the form of<\/mark><\/strong>
A) Concentric circles
B) Straight lines
C) Random curves
D) Elliptical rings
Answer:<\/strong> A) Concentric circles
Explanation:<\/strong> Oersted showed that the magnetic field lines form concentric circles around the wire.<\/p>\n\n\n\n

4. The direction of the magnetic field around a current-carrying wire can be found by<\/mark><\/strong>
A) Right-hand thumb rule
B) Left-hand rule
C) Fleming\u2019s rule
D) Ampere\u2019s rule
Answer:<\/strong> A) Right-hand thumb rule
Explanation:<\/strong> When the thumb points in current\u2019s direction, fingers curl in the magnetic field direction.<\/p>\n\n\n\n

5. A solenoid is<\/mark><\/strong>
A) A coil of insulated wire
B) A straight conductor
C) A permanent magnet
D) A battery
Answer:<\/strong> A) A coil of insulated wire
Explanation:<\/strong> When current passes through it, the solenoid produces a magnetic field similar to a bar magnet.<\/p>\n\n\n\n

6. The magnetic field inside a solenoid is<\/mark><\/strong>
A) Uniform
B) Non-uniform
C) Zero
D) Irregular
Answer:<\/strong> A) Uniform
Explanation:<\/strong> The field inside is uniform and parallel to the axis of the solenoid.<\/p>\n\n\n\n

7. The magnetic field around a solenoid resembles that of a<\/mark><\/strong>
A) Bar magnet
B) Circular loop
C) Straight wire
D) Coil
Answer:<\/strong> A) Bar magnet
Explanation:<\/strong> One end behaves like a north pole and the other like a south pole.<\/p>\n\n\n\n

8. The polarity of an electromagnet can be changed by<\/mark><\/strong>
A) Reversing the direction of current
B) Increasing the wire length
C) Changing the coil material
D) Heating the coil
Answer:<\/strong> A) Reversing the direction of current<\/p>\n\n\n\n

9. The strength of an electromagnet increases when<\/mark><\/strong>
A) Current or coil turns increase
B) Wire is shortened
C) Core is removed
D) Current is stopped
Answer:<\/strong> A) Current or coil turns increase
Explanation:<\/strong> Stronger current and more turns produce stronger magnetic fields.<\/p>\n\n\n\n

10. The material used as a core in an electromagnet is<\/mark><\/strong>
A) Soft iron
B) Steel
C) Copper
D) Aluminium
Answer:<\/strong> A) Soft iron
Explanation:<\/strong> Soft iron magnetizes easily and loses magnetism quickly when current stops.<\/p>\n\n\n\n

11. An electromagnet works on the principle of<\/mark><\/strong>
A) Magnetic effect of electric current
B) Electrostatic induction
C) Heating effect
D) Light emission
Answer:<\/strong> A) Magnetic effect of electric current<\/p>\n\n\n\n

12. The device that converts electrical energy into mechanical energy using magnetic effect is<\/mark><\/strong>
A) Electric motor
B) Generator
C) Transformer
D) Battery
Answer:<\/strong> A) Electric motor<\/p>\n\n\n\n

13. The device that converts mechanical energy into electrical energy using magnetic induction is<\/mark><\/strong>
A) Electric generator
B) Transformer
C) Motor
D) Battery
Answer:<\/strong> A) Electric generator<\/p>\n\n\n\n

14. The principle of an electric motor is based on<\/mark><\/strong>
A) Force on a current-carrying conductor in a magnetic field
B) Heating effect
C) Resistance
D) Reflection
Answer:<\/strong> A) Force on a current-carrying conductor in a magnetic field<\/p>\n\n\n\n

15. The direction of motion of the conductor in a magnetic field is given by<\/mark><\/strong>
A) Fleming\u2019s left-hand rule
B) Right-hand rule
C) Thumb rule
D) Ampere\u2019s rule
Answer:<\/strong> A) Fleming\u2019s left-hand rule
Explanation:<\/strong> It gives the direction of force, magnetic field, and current.<\/p>\n\n\n\n

16. The principle of an electric generator is<\/mark><\/strong>
A) Electromagnetic induction
B) Electrostatic effect
C) Chemical effect
D) Magnetic effect
Answer:<\/strong> A) Electromagnetic induction<\/p>\n\n\n\n

17. The phenomenon of producing current by changing magnetic field is called<\/mark><\/strong>
A) Electromagnetic induction
B) Electrolysis
C) Magnetization
D) Conduction
Answer:<\/strong> A) Electromagnetic induction<\/p>\n\n\n\n

18. Electromagnetic induction was discovered by<\/mark><\/strong>
A) Michael Faraday
B) Oersted
C) Ampere
D) Tesla
Answer:<\/strong> A) Michael Faraday<\/p>\n\n\n\n

19. The device that increases or decreases AC voltage is<\/mark><\/strong>
A) Transformer
B) Generator
C) Motor
D) Battery
Answer:<\/strong> A) Transformer
Explanation:<\/strong> A transformer transfers energy between circuits through electromagnetic induction.<\/p>\n\n\n\n

20. A transformer works only on<\/mark><\/strong>
A) Alternating current (AC)
B) Direct current (DC)
C) Both
D) Static electricity
Answer:<\/strong> A) Alternating current (AC)
Explanation:<\/strong> Because AC continuously changes direction, inducing voltage in another coil.<\/p>\n\n\n\n

21. The soft iron core in a transformer is used to<\/mark><\/strong>
A) Increase magnetic flux
B) Decrease weight
C) Prevent short circuit
D) Produce sound
Answer:<\/strong> A) Increase magnetic flux<\/p>\n\n\n\n

22. The energy loss in a transformer due to repeated magnetization is called<\/mark><\/strong>
A) Hysteresis loss
B) Heat loss
C) Radiation loss
D) Leakage loss
Answer:<\/strong> A) Hysteresis loss<\/p>\n\n\n\n

23. The device used to detect the presence of current is<\/mark><\/strong>
A) Galvanometer
B) Ammeter
C) Voltmeter
D) Wattmeter
Answer:<\/strong> A) Galvanometer<\/p>\n\n\n\n

24. The instrument used to measure electric current is<\/mark><\/strong>
A) Ammeter
B) Voltmeter
C) Wattmeter
D) Galvanometer
Answer:<\/strong> A) Ammeter<\/p>\n\n\n\n

25. The instrument used to measure voltage is<\/mark><\/strong>
A) Voltmeter
B) Ammeter
C) Galvanometer
D) Ohmmeter
Answer:<\/strong> A) Voltmeter<\/p>\n\n\n\n

26. The part of a motor that rotates is called<\/mark><\/strong>
A) Armature
B) Stator
C) Core
D) Brush
Answer:<\/strong> A) Armature<\/p>\n\n\n\n

27. The stationary part of an electric motor is called<\/mark><\/strong>
A) Stator
B) Rotor
C) Commutator
D) Coil
Answer:<\/strong> A) Stator<\/p>\n\n\n\n

28. The device used to convert DC into AC is<\/mark><\/strong>
A) Inverter
B) Transformer
C) Rectifier
D) Motor
Answer:<\/strong> A) Inverter<\/p>\n\n\n\n

29. The device used to convert AC into DC is<\/mark><\/strong>
A) Rectifier
B) Inverter
C) Transformer
D) Motor
Answer:<\/strong> A) Rectifier<\/p>\n\n\n\n

30. The rule used to find direction of induced current is<\/mark><\/strong>
A) Fleming\u2019s right-hand rule
B) Left-hand rule
C) Thumb rule
D) Maxwell\u2019s rule
Answer:<\/strong> A) Fleming\u2019s right-hand rule<\/p>\n\n\n\n

31. The magnetic field lines outside a bar magnet run from<\/mark><\/strong>
A) North to South
B) South to North
C) Random
D) None
Answer:<\/strong> A) North to South<\/p>\n\n\n\n

32. The magnetic field inside a bar magnet runs from<\/mark><\/strong>
A) South to North
B) North to South
C) Circular
D) Random
Answer:<\/strong> A) South to North<\/p>\n\n\n\n

33. The energy conversion in an electric motor is<\/mark><\/strong>
A) Electrical to mechanical
B) Mechanical to electrical
C) Heat to light
D) Light to electrical
Answer:<\/strong> A) Electrical to mechanical<\/p>\n\n\n\n

34. The energy conversion in a generator is<\/mark><\/strong>
A) Mechanical to electrical
B) Electrical to mechanical
C) Chemical to electrical
D) Heat to mechanical
Answer:<\/strong> A) Mechanical to electrical<\/p>\n\n\n\n

35. A transformer works on the principle of<\/mark><\/strong>
A) Mutual induction
B) Static induction
C) Conduction
D) Magnetization
Answer:<\/strong> A) Mutual induction<\/p>\n\n\n\n

36. The scientist who formulated laws of electromagnetic induction is<\/mark><\/strong>
A) Faraday
B) Ampere
C) Tesla
D) Newton
Answer:<\/strong> A) Faraday<\/p>\n\n\n\n

37. The magnetic field around a straight current-carrying conductor was explained by<\/mark><\/strong>
A) Oersted
B) Faraday
C) Newton
D) Ampere
Answer:<\/strong> A) Oersted<\/p>\n\n\n\n

38. The strength of a magnetic field depends on<\/mark><\/strong>
A) Current and distance from conductor
B) Shape of wire
C) Color of wire
D) Pressure
Answer:<\/strong> A) Current and distance from conductor<\/p>\n\n\n\n

39. The instrument used to observe changing magnetic fields is<\/mark><\/strong>
A) Magnetic compass
B) Ammeter
C) Voltmeter
D) Barometer
Answer:<\/strong> A) Magnetic compass<\/p>\n\n\n\n

40. The core of an electromagnet must have<\/mark><\/strong>
A) High permeability
B) High resistance
C) Low weight
D) Large size
Answer:<\/strong> A) High permeability<\/p>\n\n\n\n

41. Electromagnetic waves are produced by<\/strong>
A) Accelerating electric charges
B) Stationary charges
C) Magnetic poles
D) Electric current alone
Answer:<\/strong> A) Accelerating electric charges<\/p>\n\n\n\n

42. The scientist who unified electricity and magnetism mathematically was<\/mark><\/strong>
A) James Clerk Maxwell
B) Faraday
C) Oersted
D) Ampere
Answer:<\/strong> A) James Clerk Maxwell<\/p>\n\n\n\n

43. The part of an electric motor that reverses current direction is<\/mark><\/strong>
A) Commutator
B) Coil
C) Rotor
D) Core
Answer:<\/strong> A) Commutator<\/p>\n\n\n\n

44. A moving coil galvanometer can be converted into an ammeter by<\/mark><\/strong>
A) Connecting a low resistance in parallel
B) High resistance in series
C) Removing coil
D) Reversing polarity
Answer:<\/strong> A) Connecting a low resistance in parallel<\/p>\n\n\n\n

45. A moving coil galvanometer can be converted into a voltmeter by<\/mark><\/strong>
A) Connecting a high resistance in series
B) Low resistance in parallel
C) Changing coil
D) Reversing current
Answer:<\/strong> A) Connecting a high resistance in series<\/p>\n\n\n\n

46. The direction of induced current always opposes the cause producing it \u2014 this is<\/mark><\/strong>
A) Lenz\u2019s Law
B) Ohm\u2019s Law
C) Coulomb\u2019s Law
D) Faraday\u2019s Law
Answer:<\/strong> A) Lenz\u2019s Law<\/p>\n\n\n\n

47. The electromagnetic device that converts sound into electrical signals is<\/mark><\/strong>
A) Microphone
B) Loudspeaker
C) Motor
D) Generator
Answer:<\/strong> A) Microphone<\/p>\n\n\n\n

48. The device that converts electrical signals into sound is<\/mark><\/strong>
A) Loudspeaker
B) Microphone
C) Generator
D) Motor
Answer:<\/strong> A) Loudspeaker<\/p>\n\n\n\n

49. A current-carrying coil placed in a magnetic field experiences<\/mark><\/strong>
A) A turning force
B) No force
C) Repulsion
D) Compression
Answer:<\/strong> A) A turning force<\/p>\n\n\n\n

50. The unit of magnetic field strength is<\/mark><\/strong>
A) Tesla
B) Volt
C) Watt
D) Ampere
Answer:<\/strong> A) Tesla<\/p>\n\n\n\n

51. The phenomenon of producing induced current in a coil by changing the magnetic field is known as<\/mark><\/strong>
A) Electromagnetic induction
B) Magnetic effect
C) Electrostatics
D) Ionization
Answer:<\/strong> A) Electromagnetic induction
Explanation:<\/strong> A current is induced in a coil when the magnetic field around it changes.<\/p>\n\n\n\n

52. The scientist who demonstrated electromagnetic induction is<\/mark><\/strong>
A) Michael Faraday
B) Ampere
C) Oersted
D) Newton
Answer:<\/strong> A) Michael Faraday<\/p>\n\n\n\n

53. The direction of induced current is given by<\/mark><\/strong>
A) Fleming\u2019s right-hand rule
B) Fleming\u2019s left-hand rule
C) Ampere\u2019s law
D) Lenz\u2019s law
Answer:<\/strong> A) Fleming\u2019s right-hand rule<\/p>\n\n\n\n

54. The rule used to find the direction of motion of a current-carrying conductor in a magnetic field is<\/mark><\/strong>
A) Fleming\u2019s left-hand rule
B) Fleming\u2019s right-hand rule
C) Thumb rule
D) Faraday\u2019s law
Answer:<\/strong> A) Fleming\u2019s left-hand rule<\/p>\n\n\n\n

55. The magnetic field is strongest<\/mark><\/strong>
A) Near the poles of a magnet
B) At the center
C) Far from magnet
D) Between midpoints
Answer:<\/strong> A) Near the poles of a magnet<\/p>\n\n\n\n

56. The direction of magnetic field lines around a straight wire carrying current is<\/mark><\/strong>
A) Circular
B) Straight
C) Parallel
D) Random
Answer:<\/strong> A) Circular<\/p>\n\n\n\n

57. The magnetic field inside a current-carrying solenoid is<\/mark><\/strong>
A) Uniform and parallel
B) Circular
C) Weak
D) Irregular
Answer:<\/strong> A) Uniform and parallel<\/p>\n\n\n\n

58. The device that produces a strong magnetic field is<\/mark><\/strong>
A) Electromagnet
B) Permanent magnet
C) Battery
D) Generator
Answer:<\/strong> A) Electromagnet<\/p>\n\n\n\n

59. The strength of an electromagnet can be increased by<\/mark><\/strong>
A) Increasing current or turns
B) Decreasing current
C) Using wooden core
D) Using copper core
Answer:<\/strong> A) Increasing current or turns<\/p>\n\n\n\n

60. The energy conversion in an electric generator is<\/mark><\/strong>
A) Mechanical to electrical
B) Electrical to mechanical
C) Chemical to electrical
D) Electrical to heat
Answer:<\/strong> A) Mechanical to electrical<\/p>\n\n\n\n

61. The energy conversion in an electric motor is<\/mark><\/strong>
A) Electrical to mechanical
B) Mechanical to electrical
C) Electrical to light
D) Thermal to electrical
Answer:<\/strong> A) Electrical to mechanical<\/p>\n\n\n\n

62. The working principle of a transformer is<\/mark><\/strong>
A) Mutual induction
B) Electromagnetic force
C) Static induction
D) Heat conduction
Answer:<\/strong> A) Mutual induction<\/p>\n\n\n\n

63. A step-up transformer<\/mark><\/strong>
A) Increases voltage
B) Decreases voltage
C) Keeps voltage constant
D) Increases current
Answer:<\/strong> A) Increases voltage<\/p>\n\n\n\n

64. A step-down transformer<\/mark><\/strong>
A) Decreases voltage
B) Increases voltage
C) Increases frequency
D) Converts DC to AC
Answer:<\/strong> A) Decreases voltage<\/p>\n\n\n\n

65. The core of a transformer is made of<\/mark><\/strong>
A) Soft iron
B) Steel
C) Copper
D) Aluminium
Answer:<\/strong> A) Soft iron
Explanation:<\/strong> Soft iron allows efficient magnetic flux linkage between coils.<\/p>\n\n\n\n

66. The direction of the magnetic field around a current-carrying conductor depends on<\/mark><\/strong>
A) Direction of current
B) Material of wire
C) Temperature
D) Resistance
Answer:<\/strong> A) Direction of current<\/p>\n\n\n\n

67. The force on a current-carrying conductor in a magnetic field is<\/mark><\/strong>
A) Perpendicular to both current and field
B) Along the current
C) Along the field
D) Zero
Answer:<\/strong> A) Perpendicular to both current and field<\/p>\n\n\n\n

68. Electromagnetic induction produces<\/mark><\/strong>
A) Induced current and emf
B) Electric charge
C) Static energy
D) Resistance
Answer:<\/strong> A) Induced current and emf<\/p>\n\n\n\n

69. The device that converts AC voltage levels is<\/mark><\/strong>
A) Transformer
B) Motor
C) Generator
D) Battery
Answer:<\/strong> A) Transformer<\/p>\n\n\n\n

70. The phenomenon of self-induction occurs in<\/mark><\/strong>
A) A single coil
B) Two coils
C) Magnetic material
D) Solids
Answer:<\/strong> A) A single coil
Explanation:<\/strong> When current in a coil changes, it induces emf in the same coil.<\/p>\n\n\n\n

71. The phenomenon of mutual induction occurs in<\/mark><\/strong>
A) Two nearby coils
B) Single coil
C) Permanent magnet
D) Static charge
Answer:<\/strong> A) Two nearby coils<\/p>\n\n\n\n

72. The property of a coil that opposes change in current is called<\/mark><\/strong>
A) Inductance
B) Capacitance
C) Resistance
D) Conductance
Answer:<\/strong> A) Inductance<\/p>\n\n\n\n

73. The instrument used to measure the strength of magnetic field is<\/mark><\/strong>
A) Magnetometer
B) Barometer
C) Thermometer
D) Voltmeter
Answer:<\/strong> A) Magnetometer<\/p>\n\n\n\n

74. Electromagnetic waves travel at the speed of<\/mark><\/strong>
A) Light
B) Sound
C) Water waves
D) Air currents
Answer:<\/strong> A) Light
Explanation: <\/strong>Electromagnetic waves travel at the same speed as light in vacuum.<\/p>\n\n\n\n

75. Electromagnetic waves require<\/mark><\/strong>
A) No medium for propagation
B) Air medium
C) Solid medium
D) Liquid medium
Answer:<\/strong> A) No medium for propagation<\/p>\n\n\n\n

76. The electromagnetic spectrum includes<\/mark><\/strong>
A) Radio, microwaves, infrared, visible, UV, X-rays, gamma rays
B) Only light
C) Only X-rays
D) Only UV
Answer:<\/strong> A) Radio, microwaves, infrared, visible, UV, X-rays, gamma rays<\/p>\n\n\n\n

77. The electromagnetic wave with highest frequency is<\/mark><\/strong>
A) Gamma rays
B) X-rays
C) Ultraviolet rays
D) Radio waves
Answer:<\/strong> A) Gamma rays<\/p>\n\n\n\n

78. The electromagnetic wave with longest wavelength is<\/mark><\/strong>
A) Radio waves
B) X-rays
C) UV rays
D) Gamma rays
Answer:<\/strong> A) Radio waves<\/p>\n\n\n\n

79. The electromagnetic wave used in TV and radio broadcasting is<\/mark><\/strong>
A) Radio wave
B) Gamma ray
C) X-ray
D) Ultraviolet
Answer:<\/strong> A) Radio wave<\/p>\n\n\n\n

80. The electromagnetic wave used in microwave ovens is<\/mark><\/strong>
A) Microwaves
B) Infrared
C) Ultraviolet
D) Gamma rays
Answer:<\/strong> A) Microwaves<\/p>\n\n\n\n

81. The electromagnetic wave responsible for heat is<\/mark><\/strong>
A) Infrared rays
B) Ultraviolet rays
C) X-rays
D) Gamma rays
Answer:<\/strong> A) Infrared rays<\/p>\n\n\n\n

82. The electromagnetic waves responsible for causing sunburn are<\/mark><\/strong>
A) Ultraviolet rays
B) Infrared rays
C) Radio waves
D) Microwaves
Answer:<\/strong> A) Ultraviolet rays<\/p>\n\n\n\n

83. The electromagnetic waves used for medical imaging are<\/mark><\/strong>
A) X-rays
B) Infrared rays
C) Ultraviolet rays
D) Radio waves
Answer:<\/strong> A) X-rays<\/p>\n\n\n\n

84. The electromagnetic waves emitted by radioactive decay are<\/mark><\/strong>
A) Gamma rays
B) X-rays
C) Microwaves
D) Infrared rays
Answer:<\/strong> A) Gamma rays<\/p>\n\n\n\n

85. The electromagnetic wave used in radar systems is<\/mark><\/strong>
A) Microwaves
B) Infrared rays
C) X-rays
D) Gamma rays
Answer:<\/strong> A) Microwaves<\/p>\n\n\n\n

86. The scientist who discovered electromagnetic waves was<\/mark><\/strong>
A) Heinrich Hertz
B) Faraday
C) Ampere
D) Oersted
Answer:<\/strong> A) Heinrich Hertz<\/p>\n\n\n\n

87. The SI unit of magnetic flux is<\/mark><\/strong>
A) Weber
B) Tesla
C) Volt
D) Watt
Answer:<\/strong> A) Weber<\/p>\n\n\n\n

88. The SI unit of magnetic field strength is<\/mark><\/strong>
A) Tesla
B) Newton
C) Ampere
D) Joule
Answer:<\/strong> A) Tesla<\/p>\n\n\n\n

89. The magnetic field intensity is directly proportional to<\/mark><\/strong>
A) Current
B) Voltage
C) Resistance
D) Pressure
Answer:<\/strong> A) Current<\/p>\n\n\n\n

90. The force experienced by a moving charge in a magnetic field depends on<\/mark><\/strong>
A) Velocity and field strength
B) Mass only
C) Temperature
D) Volume
Answer:<\/strong> A) Velocity and field strength<\/p>\n\n\n\n

91. The instrument used to visualize waveforms of electrical signals is<\/mark><\/strong>
A) Cathode Ray Oscilloscope (CRO)
B) Voltmeter
C) Ammeter
D) Magnetometer
Answer:<\/strong> A) Cathode Ray Oscilloscope (CRO)<\/p>\n\n\n\n

92. The magnetic lines of force never<\/mark><\/strong>
A) Intersect each other
B) Form closed loops
C) Have direction
D) Exist in space
Answer:<\/strong> A) Intersect each other
Explanation:<\/strong> At a point, the magnetic field has only one direction, so lines never cross.<\/p>\n\n\n\n

93. The strength of Earth\u2019s magnetic field is maximum at<\/mark><\/strong>
A) Poles
B) Equator
C) Center
D) Tropics
Answer:<\/strong> A) Poles<\/p>\n\n\n\n

94. The magnetic field of Earth is caused by<\/mark><\/strong>
A) Motion of molten iron in Earth\u2019s core
B) Rotation of Earth
C) Sunlight
D) Gravitational pull
Answer:<\/strong> A) Motion of molten iron in Earth\u2019s core<\/p>\n\n\n\n

95. The principle of electric bell is based on<\/mark><\/strong>
A) Magnetic effect of current
B) Heating effect
C) Chemical effect
D) Electrolysis
Answer:<\/strong> A) Magnetic effect of current<\/p>\n\n\n\n

96. The device that stores magnetic energy is<\/mark><\/strong>
A) Inductor
B) Capacitor
C) Resistor
D) Transformer
Answer:<\/strong> A) Inductor<\/p>\n\n\n\n

97. The discovery that light is an electromagnetic wave was made by<\/mark><\/strong>
A) James Clerk Maxwell
B) Hertz
C) Newton
D) Faraday
Answer:<\/strong> A) James Clerk Maxwell<\/p>\n\n\n\n

98. The electromagnetic wave used for communication with satellites is<\/mark><\/strong>
A) Microwaves
B) X-rays
C) Gamma rays
D) Infrared rays
Answer:<\/strong> A) Microwaves<\/p>\n\n\n\n

99. The magnetic force is strongest when the conductor and magnetic field are<\/mark><\/strong>
A) Perpendicular to each other
B) Parallel
C) Opposite
D) In same line
Answer:<\/strong> A) Perpendicular to each other<\/p>\n\n\n\n

100. Electromagnetism is the basis of<\/mark><\/strong>
A) Motors, generators, transformers, and communication systems
B) Sound and heat
C) Friction
D) Gravity
Answer:<\/strong> A) Motors, generators, transformers, and communication systems
Explanation:<\/strong> Almost all modern electrical machines and technologies rely on electromagnetic principles.<\/p>\n","protected":false},"excerpt":{"rendered":"

1. The study of electric current and magnetic fields together is calledA) ElectromagnetismB) MagnetismC) ElectrostaticsD) ElectrochemistryAnswer: A) ElectromagnetismExplanation: Electromagnetism deals with the interaction between electricity and magnetism. 2. The scientist who discovered the magnetic effect of electric current isA) OerstedB) FaradayC) MaxwellD) AmpereAnswer: A) OerstedExplanation: Oersted discovered that current in a wire produces a magnetic<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"[]"},"categories":[8],"tags":[15737,15481,15820,15821,15720,15819,15816,15681,15815,15822,10961,15818,15817,15736,15733,15729,15740,4029,5649,15465,5623,15789,15536,15479,15474,15467,15483,15472,15592,15456,15478,15735,15469,15480],"class_list":{"0":"post-12680","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-physics","7":"tag-amperes-law","8":"tag-competitive-exam-physics","9":"tag-electric-and-magnetic-effects","10":"tag-electric-circuits","11":"tag-electric-current","12":"tag-electromagnet","13":"tag-electromagnetic-induction","14":"tag-electromagnetic-waves","15":"tag-electromagnetism-in-physics","16":"tag-electromagnetism-problems","17":"tag-electromagnetism-top-100-mcqs-with-answer-and-explanation","18":"tag-faradays-law","19":"tag-lenzs-law","20":"tag-lorentz-force","21":"tag-magnetic-effects-of-current","22":"tag-magnetic-field","23":"tag-magnetic-induction","24":"tag-mcqs-adda","25":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","26":"tag-mcqs-for-physics-exam","27":"tag-mcqs-for-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","28":"tag-physics-concepts","29":"tag-physics-formulas","30":"tag-physics-learning","31":"tag-physics-mcqs","32":"tag-physics-preparation-material","33":"tag-physics-questions-and-answers","34":"tag-physics-quiz","35":"tag-physics-revision","36":"tag-physics-study-material","37":"tag-psc-physics-mcqs","38":"tag-solenoid","39":"tag-ssc-physics-mcqs","40":"tag-upsc-physics-mcqs"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=12680"}],"version-history":[{"count":6,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12680\/revisions"}],"predecessor-version":[{"id":17706,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12680\/revisions\/17706"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=12680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=12680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=12680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}