Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1000 1080 1203 1200 1000 1080 1203 1200 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a three phase slip-ring induction motor, brushes are connected to 3 - Φ AC supply. DC supply. external star-connected resistors. equalizing coils. 3 - Φ AC supply. DC supply. external star-connected resistors. equalizing coils. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction depends on which of the following? both 1 and 2 magnitude of load current power factor of load None of these both 1 and 2 magnitude of load current power factor of load None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature resistance control method is also called as-----------? constant voltage control constant torque control constant current control constant power control constant voltage control constant torque control constant current control constant power control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The working principle of transformer depends on Newtons law. Faradays law of electromagnetic induction. Coulombs law. Amperes law. Newtons law. Faradays law of electromagnetic induction. Coulombs law. Amperes law. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Torque developed in the rotor is inversely proportional to slip directly proportional to slip either of these not dependent on the slip inversely proportional to slip directly proportional to slip either of these not dependent on the slip ANSWER DOWNLOAD EXAMIANS APP
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