Electrical Machines Which of the following methods are used to control the speed of DC motors is armature circuit resistance control All of these supply voltage control field current control armature circuit resistance control All of these supply voltage control field current control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be 2.7 mWb. 3.5 mWb. 1.2 mWb. 1.4 mWb. 2.7 mWb. 3.5 mWb. 1.2 mWb. 1.4 mWb. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc motors, under leading pole tips flux density will--------? either increase or decrease increase None of these decrease either increase or decrease increase None of these decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to V2 f V f2 V2 f V f2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power of a dc motor is given by EbIa2. EbIa. EIa. none of these. EbIa2. EbIa. EIa. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The interpoles in dc machines have a tapering shape in order to reduce the overall weight increase the acceleration of commutation reduce the saturation in the interpole economise on the material required for interpoles and their windings reduce the overall weight increase the acceleration of commutation reduce the saturation in the interpole economise on the material required for interpoles and their windings ANSWER DOWNLOAD EXAMIANS APP
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