Electrical Machines When flux density is constant in a transformer, hysteresis loss varies as f V V² f² f V V² f² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the mechanical angle α between the stator and rotor poles increases, then the stator current Increases. None of above. Decreases. Remains unchanged. Increases. None of above. Decreases. Remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for hoisting and lowering which type of motor is preferred? DC series motor. AC slip ring motor. Synchronous motor. Single phase induction motor. DC series motor. AC slip ring motor. Synchronous motor. Single phase induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting in a synchronous cannot be due to variable frequency. windage friction. variable supply voltage. variable load. variable frequency. windage friction. variable supply voltage. variable load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor electromagnetic torque developed is Proportional to the armature current. Proportional to the square of armature current. Inversely proportional to the armature current. None of above. Proportional to the armature current. Proportional to the square of armature current. Inversely proportional to the armature current. None of above. 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 reversing main winding terminals. Rotation can be changed by interchanging supply terminals. Direction of rotation cannot be changed. None of these. Rotation can be changed by reversing main winding terminals. Rotation can be changed by interchanging supply terminals. Direction of rotation cannot be changed. None of these. ANSWER DOWNLOAD EXAMIANS APP
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