What device is like the reverse of an electric motor?
a. generator
c. steam engine
b. tesla coil
d. battery

A) Generator

Explanation:

In electric motor the electric current flows into the coils will produce the magnetic moment in the coil due to which the coil will start rotating between the magnetic field present in that region.

So here the electrical energy is converted into mechanical energy.

Now when we take a look into the mechanism of generator then in that part the coil is first turned by some mechanical process due to which its mechanical energy is converted into electrical energy.

So we will get electric current as output

So here they both are reverse of each other and hence correct answer will be

A) Generator

it doesn't. it was imagined up in the middle ages.

not too sure thinking all accelerations are pointed down