Electrical Machines If we increase the rotor reactance value, the maximum torque will None of these not changed decrease increase None of these not changed decrease increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is running with a divertor connected across its field winding. If the divertor resistance is reduced then the speed of the motor will become execessively high. increase. decrease. remain unaltered. become execessively high. increase. decrease. remain unaltered. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1.0 Ω and armature current is 10 A. of the excitation of the machine is reduced by 10%, the extra resistance to be put in the armature circuit to maintain the same speed and torque will be 2 .1 Ω 3.1 Ω 1.79 Ω 1.8 9 Ω 2 .1 Ω 3.1 Ω 1.79 Ω 1.8 9 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in DC Shunt Motor the flux is reduced suddenly to zero, then the motor will attain dangerously high speed. the motor will come to stop. the armature current will reduce. the speed of motor will be reduced. the motor will attain dangerously high speed. the motor will come to stop. the armature current will reduce. the speed of motor will be reduced. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A. 240 V. 150 V. 220 V. 280 V. 240 V. 150 V. 220 V. 280 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power developed by salient pole synchronous machine is/are power due to saliency or reluctance only None of these excitation power only both 1 and 2 power due to saliency or reluctance only None of these excitation power only both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS