Question

A motor converts electrical energy into
(A). mechanical energy
(B). chemical energy
(C). nuclear energy
(D). thermal energy

Answer 1

Hint: Energy of a body is its ability to do work. Energy possessed due to electricity is known as electrical energy. Motor, just like other machines can convert between different forms of energy as energy cannot be created or destroyed, it can only be changed between different forms.

Complete step by step answer:
We know from the law of conservation of energy, energy can neither be created nor be destroyed; it can only be converted from one form to the other. That is how most machines work, by converting one form of energy into the other.
Energy can be defined as the ability of a body to do work. Work and energy have the same units. Therefore, energy can also be converted to work and the work done on a body can be stored in it in the form of energy.
The energy possessed by the body due to its motion is known as kinetic energy. The energy possessed by a body due to its position is known as its potential energy.
Mechanical energy is the sum between kinetic energy and mechanical energy of a body.
A motor is a machine which receives energy from electricity as electrical energy and converts it into mechanical energy.
 Therefore, a motor converts electrical energy into mechanical energy.

So, the correct answer is “Option A”.

Note: Work and energy are scalar quantities as they do not have direction. Their SI unit is joules. Mechanical energy is conserved for isolated systems and conservative forces. Different types of motor can convert different energies. Motors operate by the action of torque due to interaction between their magnetic field and electric energy.