Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field in reverse. to earth. to an AC source. to a DC source. in reverse. to earth. to an AC source. to a DC source. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is running at rated speed without any additional resistance in series. If an additional resistance is placedin series, the speed of motor Oscillates around the rated speed. Decreases. Increases. Remains unchanged. Oscillates around the rated speed. Decreases. Increases. Remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In electric locomotives which of the following motor are used ? DC series motor. DC compound motor. Synchronous motor. DC Shunt motor. DC series motor. DC compound motor. Synchronous motor. DC Shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is Fmax. (3/2)Fmax. 3Fmax. (1/2)Fmax. Fmax. (3/2)Fmax. 3Fmax. (1/2)Fmax. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In shaded pole induction motors, the flux moves from ------------- region to ----------------- region respectively? shaded, shaded shaded, unshaded unshaded, unshaded unshaded, shaded shaded, shaded shaded, unshaded unshaded, unshaded unshaded, shaded ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power of a dc motor is given by EbIa. none of these. EIa. EbIa2. EbIa. none of these. EIa. EbIa2. ANSWER DOWNLOAD EXAMIANS APP
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