Electrical Machines A simple method of increasing the voltage of a DC generator is to increase the number of turns in armature coil. increase the source frequency. increase the number of turns in field coil. increase the speed of shaft rotation. increase the number of turns in armature coil. increase the source frequency. increase the number of turns in field coil. increase the speed of shaft rotation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which method is less recommendable for induction motor starting in the industries? Stator resistance starting. Auto transformer starting. Rotor resistance starting. Direct online starting. Stator resistance starting. Auto transformer starting. Rotor resistance starting. Direct online starting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous machine has P number of poles, find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm)? ωe = ωm ωe = 2/P*ωm ωe = P*ωm ωe = P/2*ωm ωe = ωm ωe = 2/P*ωm ωe = P*ωm ωe = P/2*ωm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of bearing is provided in small induction motors to support the rotor shaft? None of these Ball bearings. Bush bearings. Cast iron bearings. None of these Ball bearings. Bush bearings. Cast iron bearings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a standard frequency the machine operates at a particular speed known as any of the above. normal speed. slip speed. synchronous speed. any of the above. normal speed. slip speed. synchronous speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What will happen if the the supply terminals are reversed in case of a DC shunt motor? The motor will run in reverse direction. The motor will run at its normal speed in the same direction as before. The motor will stop. The motor will run much faster in the same direction. The motor will run in reverse direction. The motor will run at its normal speed in the same direction as before. The motor will stop. The motor will run much faster in the same direction. ANSWER DOWNLOAD EXAMIANS APP
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