Electrical Machines From no load to full load the slip will slightly increase. None of these slightly decrease. not change. slightly increase. None of these slightly decrease. not change. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An electric motor with constant output power will have a torque speed characteristics in the form of a Circle about the origin. Straight line parallel to the speed axis. Rectangular hyperbola Straight line through the origin. Circle about the origin. Straight line parallel to the speed axis. Rectangular hyperbola Straight line through the origin. 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 1.8 9 Ω 1.79 Ω 2 .1 Ω 3.1 Ω 1.8 9 Ω 1.79 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a polyphase induction motor helps to reduce the magnetizing current. increase the starting torque. reduce the chance of crawling. reduce the chance of cogging. reduce the magnetizing current. increase the starting torque. reduce the chance of crawling. reduce the chance of cogging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Why are capacitors used with large AC induction motor? Improve voltage level. Improve current level. Improve power factor. Improve power level. Improve voltage level. Improve current level. Improve power factor. Improve power level. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? GNA MNA either GNA or MNA None of these GNA MNA either GNA or MNA None of these ANSWER DOWNLOAD EXAMIANS APP
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