Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss increase. remains constant. None of these decrease. increase. remains constant. None of these decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field circuit of a DC shunt motor is opened DC Shunt Motor The speed of motor will be reduced. The armature current will reduce. The motor will attain dangerously high speed. DC Shunt Motor The speed of motor will be reduced. The armature current will reduce. The motor will attain dangerously high speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The factors that are responsible for decrease in terminal voltage of a shunt generator are armature resistance, effect of armature reaction. armature resistance, inter poles, armature. reduction in field current, effect of armature reaction, armature. armature resistance, effect of armature reaction. armature resistance, effect of armature reaction. armature resistance, inter poles, armature. reduction in field current, effect of armature reaction, armature. armature resistance, effect of armature reaction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A compound dc generator is delivering full load current at a terminal voltage of 230 V. Its series-field winding gets short circuited. If its terminal voltage 1. becomes more than 230 V, it is overcompounded generator 2. becomes more than 230 V, it is differentially compounded generator 3. becomes less than 230 V, it is overcompounded generator 4. becomes less than 230 V, it is differentially compounded generator 5. becomes less than 230 V, it is level compounded generator From these, the correct answer is 2, 3, 5 1, 4 1, 4, 5 2,3 2, 3, 5 1, 4 1, 4, 5 2,3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor power output of 3-phase induction motor is 15 KW. The rotor copper losses at a slip of 4% will be 700 W 600 W 625 W 650 W 700 W 600 W 625 W 650 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A short-shunt cumulatively-compounded dc generator builds up a voltage of 220 V at no load at rated speed. If it is operated as a differentially compounded generator, other things remaining the same, it would build up 220 V more than 220 V somewhat less than 220 V 6 V 220 V more than 220 V somewhat less than 220 V 6 V ANSWER DOWNLOAD EXAMIANS APP
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