A class is designing a d.c. motor. To achieve a greater turning effect, three suggestions are made.
Have a larger current in the coil of the motor.
Have a stronger magnet in the motor.
Put a larger number of turns on the coil.
Which suggestions will help to increase the turning effect?
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
