Question Detail

PHY 102 Electromagnetic Induction 2 Objective Question
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Question

What is the phenomenon known as 'back-emf' according to Lenz's Law?
Options
A The electromotive force produced when a magnetic field changes at a constant rate.
B The induced emf that supports the change in current in a coil.
C The self-induced emf that opposes the change in current in a coil due to its direction.
Correct Answer
D The emf generated by a battery in opposition to an external voltage source.
Correct Answer

Option C is the correct answer.

Detailed Explanation

Page 22 explains, 'This self-induced emf will, by Lenz's law oppose the change in current in the coil and because of its direction this self-induced emf is generally called a back-emf.'

Hint

Lenz's Law is fundamentally about opposition to change.

Question Info

Course: PHY 102
Topic: Electromagnetic Induction 2
Type: Objective
Difficulty: Not specified
Question 760 of 1819
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