Free Electromagnetic Induction MCQs with Answers
288 Electromagnetic Induction MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
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Read the Electromagnetic Induction notesFree MDCAT chapter notes with key terms288 questions · page 7 of 15
- A. Split rings
- B. Slip rings
- C. Loop rings
- D. Coiled rings
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Correct answer: Slip rings122. The direction of the induced emf during electromagnetic induction can be determined by the use of:
- A. Amperes law
- B. Coulomb's law
- C. Lenz's law
- D. Faraday's law
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Correct answer: Lenz's law- A. D.C generator
- B. Commutator
- C. Motor
- D. A.C generator
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Correct answer: Motor- A. Resistor
- B. Rheostat
- C. Transformer
- D. Solenoid
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Correct answer: Transformer- A. Current and magnetic field
- B. Force on a current carrying conductor and magnetic field
- C. Induced emf and the rate of change of magnetic flux
- D. None of these
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Correct answer: Current and magnetic field- A. Conservation of mass
- B. Conservation of energy
- C. Conservation of charge
- D. Conservation of momentum
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Correct answer: Conservation of energy- A. 1.26 volt
- B. 25.2 volt
- C. 2.52 volt
- D. 5.04 volt
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Correct answer: 2.52 volt- A. Lenz's law
- B. Faraday's law
- C. Ampere's law
- D. None of these
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Correct answer: Lenz's law- A. Galvanometer
- B. Voltmeter
- C. Electric motor
- D. A.C generator
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Correct answer: A.C generator- A. Clockwise
- B. Anticlockwise
- C. First clockwise and then anticlockwise
- D. None of above
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Correct answer: Clockwise- A. Becomes one third of its initial value
- B. Remains unchanged
- C. Becomes nine times of its initial value
- D. Increased by 3 times
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Correct answer: Increased by 3 times- A. Points to the right
- B. Points to the left
- C. Points up the paper
- D. Points down into the paper
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Correct answer: Points down into the paper- A. Number of turns of the coil
- B. Total flux linked with the coil
- C. Coefficient of self inductance
- D. None of the above
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Correct answer: Coefficient of self inductance- A. Electric bell
- B. Electric motor
- C. Dynamo
- D. None of these
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Correct answer: Electric motor- A. Very small
- B. Very large
- C. No change
- D. None of these
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Correct answer: Very small- A. Transformer
- B. D.C generator
- C. A.C generator
- D. Electric motor
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Correct answer: Electric motor- A. An armature
- B. A commutator
- C. Magnetic field
- D. All of above
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Correct answer: All of above- A. Armature coil
- B. Primary coil
- C. Secondary coil
- D. Field coils
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Correct answer: Field coils- A. Helps the emf running the motor
- B. Opposes the emf running the motor
- C. Both (a) and (b)
- D. None of these
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Correct answer: Opposes the emf running the motor- A. Option A
- B. Option B
- C. Option C
- D. Option D
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Correct answer: Option A