Direction of the current in the compensating winding is________ to the direction of current in the armature conductors? exactly opposite either of these same None of these TRUE ANSWER : ? YOUR ANSWER : ?
A large series motor is never started without some mechanical on it because otherwise it will Open fuse or circuit breaker. Draw too much current. Develop excessive speed and damage itself. Produce sparking at brushes. TRUE ANSWER : ? YOUR ANSWER : ?
In synchronous generator, inverted V curve is drawn between field current on X-axis and power factor on Y-axis field current on Y-axis and armature current on X-axis field current on X-axis and armature current on Y-axis field current on Y-axis and power factor on X-axis TRUE ANSWER : ? YOUR ANSWER : ?
A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed? 15.28 Nm 15.6 Nm Zero 16.55 Nm TRUE ANSWER : ? YOUR ANSWER : ?
Capacitor in split phase induction motor is used to improve the starting torque. reduce the harmonics. start the motor. improve the power factor. TRUE ANSWER : ? YOUR ANSWER : ?
The torque developed in IM is nearly proportional to 1 / V. V2. V. 1 / V2. TRUE ANSWER : ? YOUR ANSWER : ?
In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses? 0.5Kw 2KW 3KW 1.5KW TRUE ANSWER : ? YOUR ANSWER : ?
If in DC Shunt Motor the flux is reduced suddenly to zero, then the motor will come to stop. the speed of motor will be reduced. the motor will attain dangerously high speed. the armature current will reduce. TRUE ANSWER : ? YOUR ANSWER : ?
The brushes of a DC machine should be placed on the armature midway between poles. commutator in the inter polar axis. armature in the polar axis. commutator in the polar axis. TRUE ANSWER : ? YOUR ANSWER : ?
In DC generator, which component plays the vital role to produce the direct current? Armature. Brush. Yoke. Commutator. TRUE ANSWER : ? YOUR ANSWER : ?