BARC EE : Electrical Machines Quiz-3

What is the ratio of starting torque and maximum torque of a 3-phase, 50Hz, 4-pole induction motor when the maximum torque occurs at 1200 rpm?

The operating region when a 3-phase induction motor is run at speed more than synchronous speed in the same direction.

At s = 0, the torque of an induction motor is:-

The supply voltage to a 3-phase induction motor is reduced by 10 percent. By what percentage will the maximum torque decrease?

If static voltage of a squirrel case induction motor reduced to 75% of its rated value, the developed torque is reduced by how many % of its full load value?

A 20 turn iron-cored inductor is connected to 100V, 50Hz source. The maximum flux density of core is 1Wb/m². The cross sectional area of core is ____.

In an induction motor, number of stator slots should never be equal to number of rotor slots in order to prevent:

When starting a differentially connected compound motors, it is desirable to short circuit the series field winding to .......

A 3-ph induction motor under dc dynamic braking work as:-