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DC MOTORS

DC Motors
The direction of rotation of a D.C. series motor can be changed by

Either of (A) and (B) above
Interchanging supply terminals
None of these
Interchanging field terminals

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DC Motors
Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be

Differentially compounded
Cumulatively compounded
Under compounded
Level compounded

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DC Motors
If the supply voltage for a D.C. motor is increased, which of the following will decrease?

All of these
Full-load current
Operating speed
Starting torque

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DC Motors
Differentially compound D.C. motors can find applications requiring

Low starting torque
High starting torque
Frequent on-off cycles
Variable speed

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DC Motors
At the instant of starting when a D.C. motor is put on supply, it behaves like

A capacitive circuit
A highly resistive circuit
A low resistance circuit
None of these

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