Question

A generator is a device that _____.

Answer 1

Answer:

converts mechanical energy into electrical energy by rotating a coil of wire in a magnetic field

Explanation:

generator is based on the principle of Electromagnetic Induction given by Faraday's law.

As per above law rate of change in magnetic flux will induce EMF in closed coil.

$EMF = \frac{d\phi}{dt}$

here we know

$\phi = BAcos\theta$

so we will have

$EMF = \frac{d}{dt}(BAcos\theta)$

$EMF = BA\omega sin\theta$

so in this way if we rotate a coil between magnetic field of strong magnets by using mechanical energy then it will produce electric energy.

Answer 2

Th correct option is D.
A generator operates by converting mechanical energy into electrical energy by rotating coils of wire around magnetic field. There are two types of generator, a direct current generator and an alternating current generator.