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Electrical Machines

Electrical Machines
In DC motors, under trailing pole tips, flux density will_______ ?

None of these
 decrease
 either increase or decrease
 increase

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Electrical Machines
In a single phase induction motor, the starting torque developed is proportional to

 1/V²
 supply voltage V
 1/V
 V²

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Electrical Machines
A 20KVA auto transformer, turn ratio is 0.8. Find the power transferred conductively?

 16KVA
 0KVA
 20KVA
 4KVA

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Electrical Machines
In a DC Shunt Motor if the load current increases then field flux

 remains constant.
 decreases.
 increases.
 decreases

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Electrical Machines
Field winding of a DC series motor is usually provided with thick wire

 to provide large flux.
 in order to reduce eddy current to provide large flux.
 as it carries large load current.
 to reduce the insulation of materials.

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Electrical Machines
In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

  salient.
 non uniform cylindrical.
 cylindrical.
 none of these.

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