Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 0 Hz 100 Hz 25 Hz 50 Hz 0 Hz 100 Hz 25 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a single phase capacitor start induction motor which of the following is valid? Rotation can be changed by interchanging supply terminals. Direction of rotation cannot be changed. Rotation can be changed by reversing main winding terminals. None of these. Rotation can be changed by interchanging supply terminals. Direction of rotation cannot be changed. Rotation can be changed by reversing main winding terminals. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor has external resistance Ra and Rf in the armature and field circuits respectively. Armature current at starting can be reduced by keeping Ra maximum and Rf maximum Ra maximum and Rf minimum Rf maximum and Ra minimum Ra minimum and Rf minimum Ra maximum and Rf maximum Ra maximum and Rf minimum Rf maximum and Ra minimum Ra minimum and Rf minimum ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an ideal DC generator the regulation is positive. high. low. zero. positive. high. low. zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A short circuit test on a transformer gives copper loss at half load. copper loss at any load. copper loss at over load. copper loss at full load. copper loss at half load. copper loss at any load. copper loss at over load. copper loss at full load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be oscillating pulsating and unidirectional steady and unidirectional None of these oscillating pulsating and unidirectional steady and unidirectional None of these ANSWER DOWNLOAD EXAMIANS APP
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