EXAMIANS
A 250 volt dc series motor having an armature resistance of 0.2 Ω takes a load current of 60 A. What will be the torque produced at the shaft of the motor? Consider brush drop of 1V.
YOUR ANSWER : ?
YOUR ANSWER : ?
No load test on induction motor is conducted to find which of the following losses?
YOUR ANSWER : ?
What will be the eddy current loss if the supply frequency of a transformer becomes double?
YOUR ANSWER : ?
Series booster is a
YOUR ANSWER : ?
If the load current and the flux of a DC motor are held constant and voltage applied across its armature is increased by 5%, the speed of the motor will
YOUR ANSWER : ?
Cross magnetization effects which of the following?
YOUR ANSWER : ?
The armature core of a DC machine is laminated to minimise
YOUR ANSWER : ?
A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed?
YOUR ANSWER : ?
In synchronous motor the torque is proportional to
YOUR ANSWER : ?
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?
YOUR ANSWER : ?