Electrical Machines No load primary current in a transformer lags behind applied voltage somewhat less than 90à leads the applied voltage somewhat less than 90Ã& lags behind applied voltage by exactly 90Â&am leads the applied voltage by exactly 90Â& lags behind applied voltage somewhat less than 90à leads the applied voltage somewhat less than 90Ã& lags behind applied voltage by exactly 90Â&am leads the applied voltage by exactly 90Â& ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing of DC generator means increasing flux density by providing extra ampere-turns in field. None of these creation of residual magnetism by a DC source. neutralization of residual magnetism. increasing flux density by providing extra ampere-turns in field. None of these creation of residual magnetism by a DC source. neutralization of residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements: To control the speed of a dc shunt motor above the base speed over a reasonably wide range, the motor must 1. have compensating winding 2. have interpole winding 3. be started using a 3-point starter 4. be started using a 4-point starter Of these statements 1, 2 and 3 are correct 1, 2 and 4 are correct 1 and 3 are correct 2 and 4 are correct 1, 2 and 3 are correct 1, 2 and 4 are correct 1 and 3 are correct 2 and 4 are correct ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is the largest conversion device? DC machine All of these Synchronous machine Induction machine DC machine All of these Synchronous machine Induction machine ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 201.02 V. 210 V. 205 V. 212 V. 201.02 V. 210 V. 205 V. 212 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following statement is true for an AC synchronous motor? It is a variable speed motor. It is a constant speed motor. It is a high reluctance motor. It is a step angled motor. It is a variable speed motor. It is a constant speed motor. It is a high reluctance motor. It is a step angled motor. ANSWER DOWNLOAD EXAMIANS APP
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