The function of the sliding rheostat in the DC motor is________
A. Change the direction of rotation of the motor
B. Automatically change the N and S poles of the electromagnet
C. Automatically change the direction of current in the coil
D. Change the current in the coil, thereby changing the speed of the motor
Answer:D
The function of the sliding rheostat in the DC motor is________
A. Change the direction of rotation of the motor B. Automatically change the N and S poles of the electromagnet C. Automatically change the direction of current in the coil D. Change the current in the coil, thereby changing the speed of the motor