Question

In an electric motor, the conversion of energy that takes place is:
A. Chemical energy into electrical energy
B. Electrical energy into mechanical energy
C. Electrical energy into light
D. Electrical energy into chemical energy

Answer 1

Hint: As we all can identify that to transform energy on a daily basis to accomplish conventional needs as an energy existing in one form needs to be converted into other forms. Consider an example of solar energy accessible in the form of heat that can be transformed into electricity via solar modules. From this concept, we can choose the required option.

Complete step by step solution:
Electrical energy is the type of energy existing in the form of flowing current and electric potential that is supplied to us with a proper circuit system. But we require an electric motor to run the shaft of a fan or a driving shaft to rotate the shaft. Thus a rotating shaft has kinetic energy in the form of mechanical energy. An electric motor converts electrical energy into mechanical energy through the procedure of electromagnetic induction. So therefore we link the electric motor to a circuit to run its shaft and we get the preferred output as the rotation of the shaft provides mechanical kinetic energy. So electrical energy converts into mechanical energy. (Option B) electrical energy into mechanical energy is correct.

Note:
Let us not forget that all the energy obtainable at one end is not converted \[100\] percent to another at the succeeding end. During energy conversion, losses take place throughout the transformation, and therefore to take that into account we need to present a factor called conversion efficiency. It is given by an expression as ${\eta _{conv}} = \dfrac{{{E_2}}}{{{E_1}}}$. Here, ${\eta _{conv}}$ is the conversion efficiency which displays how much energy is transformed from one form to another. ${E_1}$ Is the primary energy obtainable which needs to be transformed and ${E_2}$ is the energy converted from ${E_1}$. Here we can notice that ${E_2} < {E_1}$. So we can determine that ${\eta _{conv}} < {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} 1$.