Electrical Machines R1 is the resistance of the primary winding of the transformer. The turn ratio in terms of primary to secondary is K. Then the equivalent resistance of the primary referred to secondary is R1 /K² R1 /K K²R1 K×R1 R1 /K² R1 /K K²R1 K×R1 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be 240 V 6 V 234 V 474 V 240 V 6 V 234 V 474 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward-Leonard system for controlling the speed of a DC motor is used where The accuracy in speed control is required. Very fine speed control over the whole range from zero to normal speed is required. The speed in both the direction is required. All of above. The accuracy in speed control is required. Very fine speed control over the whole range from zero to normal speed is required. The speed in both the direction is required. All of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc series motor driving and electric train faces a constant power load. It is running at rated speed and rated voltage. If the speed has to be brought down to 0.25 p.u. the supply voltage has to be approximately brought down to 0.125 p.u 0.75 p.u 0.5 p.u 0.25 p.u 0.125 p.u 0.75 p.u 0.5 p.u 0.25 p.u ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Due to magnetic saturation, the flux per pole in a DC machine without brush shift decreases in both generators and the motors with load. increases in generators but decreases in motor with load. decreases in generators and increases in motor with load. increases in both the generators and the motors with load. decreases in both generators and the motors with load. increases in generators but decreases in motor with load. decreases in generators and increases in motor with load. increases in both the generators and the motors with load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Type of single phase motor having highest power factor at full load is split phase. capacitor start. capacitor run. shaded pole type. split phase. capacitor start. capacitor run. shaded pole type. ANSWER DOWNLOAD EXAMIANS APP
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