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Electrical Engineering · Q17

Single Phase Induction Motors

Engineering and GATE · Electrical Engineering · question 17

Q17

In a capacitor start single-phase motor, when capacitor is replaced by a resistance

A.
torque will increase
B.
the motor will consume less power
C.
motor will run in reverse direction
D.
motor will continue to run in same direction
Answer

Answer: Option D

Solution

Answer: Option D
Solution:
In a capacitor start single-phase motor, when the capacitor is replaced by a resistance, the motor will continue to run in the same direction.

The capacitor in a single-phase motor is used to create a phase shift for starting torque.

If replaced by a resistance, the phase shift required for starting will not be achieved, resulting in lower starting torque.

However, once the motor is running, it will continue to operate in the same direction as before.

The motor's performance might be less efficient, but the direction of rotation will remain unchanged.