Electrical Machines In an induction motor, what is the ratio of rotor input to rotor copper loss? 1/(1-S) S 1-S 1/S 1/(1-S) S 1-S 1/S ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing the field of DC generator means increasing flux density by adding extra turns of winding. making the magnetic losses forces parallel. neutralising residual magnetism. creating residual magnetism by a DC source. increasing flux density by adding extra turns of winding. making the magnetic losses forces parallel. neutralising residual magnetism. creating residual magnetism by a DC source. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If terminal voltage of one 1000 rpm shunt motor is reduced to half the speed of the motor will be 500 rpm 1000 rpm 250 rpm 2000 rpm 500 rpm 1000 rpm 250 rpm 2000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed? 15.28 Nm Zero 16.55 Nm 15.6 Nm 15.28 Nm Zero 16.55 Nm 15.6 Nm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Copper brushes in DC machine are used where high voltage and low current. where low voltage and high currents are involved. None of these in both of above cases. where high voltage and low current. where low voltage and high currents are involved. None of these in both of above cases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A motor armature conductor of length 0.5 m is exposed to a flux density of 4 Wb / m2. Calculate the force experienced by the conductor, when the armature current is 5 Amp? 15 N. None of these. Can't be determined. 20 N. 15 N. None of these. Can't be determined. 20 N. ANSWER DOWNLOAD EXAMIANS APP
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