(a) 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.
(b) In what ways can a motor be made more powerful?
Answers
In this case, as long as the current is reversed, the motor rotation will be reversed.
Explanation:
i) The direction of a motor would be reversed if the current passed through the motor was reversed.
(ii) Similarly, the direction of the motor would be reversed when the magnetic field of the motor was reversed.
(iii) The direction of the motor would be the same i.e., there would be no change even if both current and magnetic were reversed simultaneously.
(b) When the number of turns present in the coil in a motor is increased, then the motor can be made more powerful.
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