Question

In the positive-sequence network of a synchronous motor, a source voltage is represented, whereas in that of an induction motor, the source voltage (a) does or (b) does not come into picture.

Short answer

Answer

The positive sequence network of induction motor does not have voltage source.

Step-by-step solution

Draw the positive sequence network of the synchronous motor and induction motor.

Draw the positive sequence network of the synchronous motor.

Draw the positive sequence network for the induction motor.

Source voltage in positive sequence network of synchronous motor.

Since the induction motor does not have the dc source magnetic flux therefore the voltage source is not present in the positive sequence network.

From the positive sequence network of the synchronous motor and induction motor it is cleared that positive sequence network of induction motor does not have voltage source.