Question

In an electric motor the ______ energy is converted into ________ energy
A. Electric, Electric
B. Mechanical, Mechanical
C. Electric, Mechanical
D. Mechanical, Electric

Answer 1

In this question we have to think about the energy conversions in an electric motor. We have to consider an electric motor and the input and output energy provided to it and given by it respectively.

Complete step by step answer:
In an electric motor there is a piston which has to be rotated so that some kind of work can be done. The rotation which is needed is provided by moving a coil in a magnetic field therefore for moving this coil some kind of energy is required therefore electrical energy is used. When electricity is passed through the coil placed in the magnetic field it experiences a force and that force turns the coil. In this way the energy conversion takes place in an electric motor. Without providing the electrical energy no force will be experienced by the coil and it will not turn therefore the motor will not work. The electric motor is used in appliances like fans where work is done by the staff of the motor to rotate the blades of the fan. This kind of work is considered as mechanical energy
Therefore, electric motors run on electricity and the energy we give into the electric motor is converted to do some kind of work. The work which is done is doing some action on a load. Since we are providing electricity to the electric motor. Therefore, we are giving it electric energy and in return we are getting some work done on a load. Therefore, the energy which we are giving in the form of electricity is being converted into mechanical energy.

So, the correct answer is “Option C”.

Note:
Whenever a question regarding energy conversion is asked about an electric motor there is a common confusion in the minds of the students between an electric motor and an electric generator in both of the devices the energy involved electric energy and mechanical energy but the conversion is opposite to each other. Therefore, the students must be cautious regarding, conversion of which device is asked in the question.