EXAMIANS
A DC series motor is running with a divertor connected across its field winding. If the divertor resistance is reduced then the speed of the motor will
YOUR ANSWER : ?
YOUR ANSWER : ?
In salient pole synchronous machine, the reluctance power varies as
YOUR ANSWER : ?
The slip of an induction motor normally does not depend on
YOUR ANSWER : ?
In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages?
YOUR ANSWER : ?
A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is
YOUR ANSWER : ?
No load test of 3-phase induction motor gives which of the following?
YOUR ANSWER : ?
In a dc machine, the demagnetizing effect of armature reaction is due to
YOUR ANSWER : ?
The counter (or back) emf in a dc machine is 1. the same as generated emf in a dc motor 2. proportional to field flux and armature speed 3. not the same as generated emf in a dc motor 4.inversely proportional to field flux 5. proportional to number of armature conductors 6. constant from no load to full load From these, the correct answer is
YOUR ANSWER : ?
Which of the following DC motors has got maximum relieving property?
YOUR ANSWER : ?
A synchronous motor is supplying a load at unity power factor. If the load on the motor is increased keeping its excitation and terminal voltage constant, the power factor
YOUR ANSWER : ?