When two D.C. series motors are connected in parallel, the resultant speed is
A
More than the normal speed
B
Loss than the normal speed
C
Normal speed
D
Zero
Correct Answer: More than the normal speed
When two DC series motor are connected in parallel then the resultant speed is more than the normal speed. If the voltage across each motor is V and current through each motor in parallel connection is $$\frac{I}{2}.$$ So$${\text{speed}} \propto \frac{{{\text{voltage}}}}{{{\text{current}}}} \propto \left( {\frac{{\text{V}}}{{\frac{{{I_{\text{a}}}}}{2}}}} \right) \Rightarrow 2\left( {\frac{{\text{V}}}{{{I_{_{\text{a}}}}}}} \right)$$
Hence the resultant speed is more than normal speed.
