The ratio of the self-induced emf to the rate of change of current in the coil is known as:
Correct answer: C. Self inductance
- A. Mutual induction
- B. Self induction
- C. Self inductance
- D. Mutual inductance
Explanation
The ratio of the self-induced electromotive force (emf) to the rate of change of current in the coil is known as self-inductance. Self-inductance refers to the property of a single coil or conductor where a changing current induces a voltage in the same coil. It quantifies the coil's opposition to changes in current flow and is measured in henries. It is a fundamental concept in electromagnetism.
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About Electromagnetic Induction
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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