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AE-JE Foundation EE : Electrical machine Quiz - 5

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Question 1

As the load is increased, the speed of a dc shunt motor:

Question 2

Which of the following braking is not suitable for motors?

Question 3

The function of starter in electric motor is

Question 4

The d.c. series motor should always be started with load because

Question 5

The speed of a d.c. shunt motor at no-load is

Question 6

The Ta Vs Ia graph of a dc series motor is a:

Question 7

In a loaded dc motor, if the brushed are given from the interpole axis in the direction of rotation then the commutation will

Question 8

An induction motor having 8 poles runs at 727.5 rpm, if the supply frequency is 50 Hz the emf in the rotor will have a frequency of

Question 9

Two d.c. series motors connected in series draw current I from supply and run at speed N. When the same two motors are connected in parallel taking current I from the supply, the speed of each motor will be:

Question 10

When the speed of a d.c. motor increases, its armature current…………………….

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