Question 1

A running motor draws 1.2 A when driven from a 24.0 V supply. Calculate the starting current of the motor if its back emf is 21.6 V.

Accepted Answer

12 A

Question 2

If the starting current of a motor is 15.0 A at 48.0 V, what is its running current if its back emf is 36.0 V at running speed?

Accepted Answer

3.75 A

Question 3

Find the back emf of a motor, whose starting current is 8.0 A and running current is 1.8 A when driven from a 12 V supply.

Accepted Answer

9.3 V

NSMQ 2024 Physics Fundamentals Round Set 17

Question 1