Electrical Machines Which of the following induction motor has maximum speed? 6 pole. 2 pole. 4 pole. 8 pole. 6 pole. 2 pole. 4 pole. 8 pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 50 Hz 25 Hz 100 Hz 0 Hz 50 Hz 25 Hz 100 Hz 0 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The magnetic field which initially induces emf in the armature in a self excited DC generator is because of None of these armature reaction. permanent magnets. residual magnetism. None of these armature reaction. permanent magnets. residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be zero. less than core loss. equal to core loss. more than core loss. zero. less than core loss. equal to core loss. more than core loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increase in speed of DC motor Both back emf as well as line current fall. Back emf increase but line current falls. Back emf falls and line current increase. Both back emf as well as line current increase. Both back emf as well as line current fall. Back emf increase but line current falls. Back emf falls and line current increase. Both back emf as well as line current increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor, the starting torque developed is proportional to supply voltage V V² 1/V 1/V² supply voltage V V² 1/V 1/V² ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS