Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat | mosaicbro.com

Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat

7 of 127 questions (Page 7 of 19)

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43 Electromagnetic induction is the phenomenon in which an emf is induced in the coil (or circuit) to the change of flux through it when:
Correct Answer: A
Explanation: Emf is induced by relative motion between coil and magnetic field.
44 Lenz’s law is in accordance with the law of conservation of:
Correct Answer: D
Explanation: Lenz’s law ensures energy conservation in induction.
45 The process in which a change of current in one coil causes an induced emf in another coil is called:
Correct Answer: B
Explanation: Mutual induction involves two coupled coils.
46 The mutual inductance of coils depends upon:
Correct Answer: D
Explanation: Mutual inductance depends on geometry and alignment, not material.
47 Mutual inductance has a practical role in the performance of the:
Correct Answer: D
Explanation: Transformers rely on mutual induction.
48 The phenomenon of producing emf in the coil due to change of current in the coil itself is called:
Correct Answer: B
Explanation: Self-induction occurs when a changing current induces emf in the same coil.
49 The SI unit of self inductance or mutual inductance is:
Correct Answer: C
Explanation: Inductance is measured in Henry (H).
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