A conductor of length L is moved across a magnetic field. Due to this activity, a potential difference appears across the ends of the conductor. This type of potential difference is termed as:
Correct answer: C. Motional EMF
- A. Self Induction
- B. Mutual Induction
- C. Motional EMF
- D. Electrostatic potential
Explanation
The correct answer is Motional EMF. When a conductor of length L moves across a magnetic field B, a potential difference appears across its ends, which is termed as motional EMF. This is induced by the movement of the conductor through the magnetic field. Self Induction and Mutual Induction involve induction of voltage in coils due to changing currents and proximity to other coils, respectively. Electrostatic potential relates to the work energy needed to move electric charge in an electric field.
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About Faraday's Law
Faraday's law states that an induced electromotive force equals the rate of change of magnetic flux linkage through a circuit. Questions cover changing field, area, angle or motion, the negative sign associated with Lenz's law, and the distinction between induced emf and the current that may flow in a closed circuit.
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