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Electrical Machines
Flux density under trailing pole tips in case of generator will
decrease
increase
None of these
either increase or decrease
decrease
increase
None of these
either increase or decrease
Answer
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Related Question
Electrical Machines
A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is
570 A.
250 A.
440 A.
340 A.
570 A.
250 A.
440 A.
340 A.
Answer
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Electrical Machines
If a DC Series motor is connected across an AC supply it will
run at normal speed.
run at lower speed.
burn.
not run.
run at normal speed.
run at lower speed.
burn.
not run.
Answer
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Electrical Machines
Find the number of poles required, when the frequency is 50Hz and speed of the motor is 500 rpm?
24
10
5
12
24
10
5
12
Answer
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Electrical Machines
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
will become leading
None of these
will become lagging
will remain the same
will become leading
None of these
will become lagging
will remain the same
Answer
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Electrical Machines
With the increases in field excitation of a DC generator, its generated emf
decreases.
remains constant.
increases upto a limit and then remains almost constant.
increases.
decreases.
remains constant.
increases upto a limit and then remains almost constant.
increases.
Answer
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