Electrical Machines In a DC generator sparking between brushes and commutator surface may be due to over commutation. any of the above. too rapid reversal of current. under commutation. over commutation. any of the above. too rapid reversal of current. under commutation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power developed by salient pole synchronous machine is/are excitation power only None of these both 1 and 2 power due to saliency or reluctance only excitation power only None of these both 1 and 2 power due to saliency or reluctance only ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following generators are used in arc welding? differential compound generators shunt generators cumulative compound generators series generators differential compound generators shunt generators cumulative compound generators series generators ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At slip s = 1 torque developed in machine is starting torque. none. electromagnetic torque. maximum torque. starting torque. none. electromagnetic torque. maximum torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Scott connections are used for three phase to single phase transformation. any of the above. three phase to two phase transformation. single phase to three phase transformation. three phase to single phase transformation. any of the above. three phase to two phase transformation. single phase to three phase transformation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The polarity of a DC generator can be reversed by any of above. reversing field electric current as well as direction of rotation. reversing the field current. increasing field current. any of above. reversing field electric current as well as direction of rotation. reversing the field current. increasing field current. ANSWER DOWNLOAD EXAMIANS APP
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