Physics 5054 · O Level · The d.c. motor

The d.c. motor — practice question

Fig. 5.1 depicts a basic d.c. motor fitted in a toy car.
(a)[2]

On Fig. 5.1, place labels in the boxes to show the motor parts indicated.

(b(i))[1]

State what happens to the coil’s rotation when the number of turns on the coil is increased.

(b(ii))[1]

State what happens to the coil’s rotation when the magnetic field between the magnet poles is reversed.

(c(i))[2]

Describe the motion of the toy car.

(c(ii))[1]

Suggest what happens to the toy car’s motion.

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