Electrical Machines The rotor of a 3 - Φ wound induction motor is provided with heavy copper or aluminium bars placed in rotor slots. single phase winding. three phase winding. heavy short-circuited end rings. heavy copper or aluminium bars placed in rotor slots. single phase winding. three phase winding. heavy short-circuited end rings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A generator may loose residual magnetism due to any of these. over excitation. vibrations. heating. any of these. over excitation. vibrations. heating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two DC generators having equal open-circuit emfs but slight different load characteristics are operating in parallel, then the machine with more drooping characteristic will supply more load. None of these the machine will share load equally. the machine with more drooping characteristic will supply less load. the machine with more drooping characteristic will supply more load. None of these the machine will share load equally. the machine with more drooping characteristic will supply less load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is done in speed control of DC motor by field flux control? Inserting an additional resistance in the armature circuit. Inserting resistance to armature circuit and field circuit. Any of above. Inserting an additional resistance in the field circuit. Inserting an additional resistance in the armature circuit. Inserting resistance to armature circuit and field circuit. Any of above. Inserting an additional resistance in the field circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC Shunt Motor the speed can be increased by Increasing the field current. Increasing the field current. Decreasing the field current. Increasing the armature current. Increasing the field current. Increasing the field current. Decreasing the field current. Increasing the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In V/f speed control of 3-phase induction motor, with increase in frequency, the slip at which maximum torque occurs None of these either of these. increase. decrease. None of these either of these. increase. decrease. ANSWER DOWNLOAD EXAMIANS APP
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