Electrical Machines Transformer action requires a constant magnetic flux. alternating magnetic lux. alternating electric flux. increasing magnetic flux. constant magnetic flux. alternating magnetic lux. alternating electric flux. increasing magnetic flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Regenerative braking is not found in which motor? DC compound. DC series. DC shunt. Induction motor. DC compound. DC series. DC shunt. Induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is 2, 3 1, 4 2, 4 1, 3 2, 3 1, 4 2, 4 1, 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss decrease. remains constant. increase. None of these decrease. remains constant. increase. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is suitable for frequent starting and stoppings? Capacitor start motor All of these Capacitor start capacitor run motor Resistance split phase motor Capacitor start motor All of these Capacitor start capacitor run motor Resistance split phase motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Copper brushes in DC machine are used where high voltage and low current. None of these in both of above cases. where low voltage and high currents are involved. where high voltage and low current. None of these in both of above cases. where low voltage and high currents are involved. ANSWER DOWNLOAD EXAMIANS APP
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