Electrical Machines For a dc machine shunt resistance and armature resistance values are low and high high and low low and low high and high low and high high and low low and low high and high ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is 1, 2, 3 2, 3, 4 2, 3, 4, 5 2, 3 ,5 1, 2, 3 2, 3, 4 2, 3, 4, 5 2, 3 ,5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a resistance split phase motor, what is the range of torque angle? 90° 70° to 85° 25° to 30° 0° 90° 70° to 85° 25° to 30° 0° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A simple method of increasing the voltage of a DC generator is to increase the source frequency. increase the number of turns in armature coil. increase the speed of shaft rotation. increase the number of turns in field coil. increase the source frequency. increase the number of turns in armature coil. increase the speed of shaft rotation. increase the number of turns in field coil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The working principle of transformer depends on Coulombs law. Amperes law. Newtons law. Faradays law of electromagnetic induction. Coulombs law. Amperes law. Newtons law. Faradays law of electromagnetic induction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For satisfactory performance of 3-phase 480V, 60 Hz induction motor, the supply voltage at 50 Hz should be equal to 480 V. 350 V. 420 V. 400 V. 480 V. 350 V. 420 V. 400 V. ANSWER DOWNLOAD EXAMIANS APP
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