Rajah menunjukkan struktur motor
Which of the following will not affect the speed of rotation of the motor?
Antara yang berikut, yang manakah tidak akan mempengaruhi kelajuan putaran motor?
A Strength of the magnetic field
Kekuatan medan magnet
B The direction of the current in the coil
Arah arus dalam gegelung
C The number of turns of wire in the coil
Bilangan lilitan dawai dalam gegelung
C The current in the coil
Arus dalam gegelung
Answer : B
The speed of the rotation does not depends on the direction of the current in the coil