Electrical Machines The starting resistance of DC motor is generally Low. Infinitely large. around 500 ohms. 1000 ohms. Low. Infinitely large. around 500 ohms. 1000 ohms. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the mechanical power developed by a DC series motor is maximum? Back emf is equal to zero. Back emf is equal to half the applied voltage. None of above. Back emf is equal to applied voltage. Back emf is equal to zero. Back emf is equal to half the applied voltage. None of above. Back emf is equal to applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ? 2 alone 1 and 3 1 and 2 1, 2 and 3 2 alone 1 and 3 1 and 2 1, 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Regenerative braking is not found in which motor? DC series. DC shunt. DC compound. Induction motor. DC series. DC shunt. DC compound. Induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field weakening control method is used for the _________ ? both A and B None of these below rated speed above rated speed both A and B None of these below rated speed above rated speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines From no load to full load the slip will not change. None of these slightly decrease. slightly increase. not change. None of these slightly decrease. slightly increase. ANSWER DOWNLOAD EXAMIANS APP
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