The product of induced current and resistance is always:
Correct answer: C. Constant
- A. Lesser
- B. Greater
- C. Constant
- D. None of above
Explanation
The product of induced current and resistance is always constant.This statement refers to Ohm's law for electromagnetic induction, which states that the product of the induced current (I) and the resistance (R) in a circuit is constant. Mathematically, this can be expressed as V = IR, where V is the induced electromotive force (emf). Therefore, if the resistance remains constant, any change in the induced current would be proportional to a corresponding change in the induced emf to maintain this constant product.
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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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