Electrical Machines Generator works on the principle of production None of these both A and B. static induced emf. dynamically induced emf. None of these both A and B. static induced emf. dynamically induced emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The fall in speed of the DC generator due to increase in load can be corrected by increasing the excitation. reducing the load voltage. cooling the armature. increasing the input to the prime mover. increasing the excitation. reducing the load voltage. cooling the armature. increasing the input to the prime mover. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor has which of the following characteristics? Has its field winding consinting of thick wire and less no of turns. Has a poor torque. Has a almost constant speed. Can be started easily without load. Has its field winding consinting of thick wire and less no of turns. Has a poor torque. Has a almost constant speed. Can be started easily without load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the mechanical angle α between the stator and rotor poles increases, then the stator current None of above. Increases. Decreases. Remains unchanged. None of above. Increases. Decreases. Remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the armature reaction results in demagnetization of centers of poles. magnetization of leading and demagnetization of trailing pole tip. demagnetization of leading & magnetization of trailing pole tip. magnetization of inter poles. demagnetization of centers of poles. magnetization of leading and demagnetization of trailing pole tip. demagnetization of leading & magnetization of trailing pole tip. magnetization of inter poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1000 1203 1200 1080 1000 1203 1200 1080 ANSWER DOWNLOAD EXAMIANS APP
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