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Magnetism and Electromagnetism - Engineering

Q1:

If a conductor is moved back and forth at a constant rate in a constant magnetic field, the voltage in the conductor will reverse polarity.

A True

B False

ANS:A - True

When a conductor is moving in a constant magnetic field, the voltage will be induced as per the Faraday's first law, which results in in-turn induces a current.

But current direction reverses as the conductor is moving back and forth, hence voltage polarity also reverses.