Q21 of 238 Page 91

In what ways can a motor be made more powerful?

To make a motor more powerful it is necessary to increase the number of turns on the coil in the motor.


More from this chapter

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20

What device reverses the current?

 21

State what would happen to the direction of rotation of a motor if :

(i) the current were reversed


(ii) the magnetic field were reversed


(iii) both current and magnetic field were reversed simultaneously.

 22

What is an electric motor? With the help of a labelled diagram, describe the working of a simple electric motor.

 22

What are the special features of commercial electric motors?