Electrical Machines When a short circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current is I1. If the test is performed by 25 V and 25 Hz and power drawn current is I2, then None of these I1 < I2 I1 = I2 I1 > I2 None of these I1 < I2 I1 = I2 I1 > I2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor drawing an armature current of Ia is operating under saturated magnetic conditions. The torque developed in the motor is proportional to I/Ia2 1/Ia Ia Ia2 I/Ia2 1/Ia Ia Ia2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator? Commutator. Eye bolt. Dummy coils. Equalizer rings. Commutator. Eye bolt. Dummy coils. Equalizer rings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3-phase induction motor, if the supply voltage and frequency are reduced by the same ratio, then slip at which maximum torque occurs is more and maximum torque decreases more and maximum torque remains constant less and maximum torque decreases less and maximum torque increases more and maximum torque decreases more and maximum torque remains constant less and maximum torque decreases less and maximum torque increases ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will develop very low starting torque. not start automatically. get damaged. start automatically without trouble. develop very low starting torque. not start automatically. get damaged. start automatically without trouble. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes twice the initial value 4 time the initial value 1/4 of the intial value 1/2 of the initial value twice the initial value 4 time the initial value 1/4 of the intial value 1/2 of the initial value ANSWER DOWNLOAD EXAMIANS APP
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