Question

State whether True or False :

If the flux of DC motor approaches to zero, its speed will also approach to zero.

• A. True
• B. False

Answer 1

The correct option is B False

In DC motor, the relation of speed and flux is given by $N\propto \frac{1}{\varphi }$ from the equation $E_b=\varphi ZNP/60A$, when other things remain constant. Now if flux is approaches to zero then the speed will be approached to infinity.