Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of None of above. Armature current. Field current. Line current. None of above. Armature current. Field current. Line current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shunt generator has a critical field resistance of 300 Ω at a speed of 800 rpm if the speed is raised to 1000 rpm the critical field resistance is 375 Ω. 145 Ω. 150 Ω. 225 Ω. 375 Ω. 145 Ω. 150 Ω. 225 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole lap wound dc generator has 4 brushes, if one of the brush is damaged, what will be the change in V, I and P ratings V/2, I and P/2 V, I and P V, I/2 and P/2 V/2, I/2 and P/4 V/2, I and P/2 V, I and P V, I/2 and P/2 V/2, I/2 and P/4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is modified. increased. reversed. none of these. modified. increased. reversed. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt. 0.5 Amp. 320 Amp. 800 Amp. 400 Amp. 0.5 Amp. 320 Amp. 800 Amp. 400 Amp. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces noise and pullout torque, but increase parasitic and starting torque. noise, parasitic torque, starting torque and pull out torque. noise, parasitic and starting torque, but increase pull out torque. noise and parasitic torque, but increase starting and pull-out torque. noise and pullout torque, but increase parasitic and starting torque. noise, parasitic torque, starting torque and pull out torque. noise, parasitic and starting torque, but increase pull out torque. noise and parasitic torque, but increase starting and pull-out torque. ANSWER DOWNLOAD EXAMIANS APP
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