Electrical Machines No load primary current in a transformer lags behind applied voltage by exactly 90Â&am leads the applied voltage by exactly 90Â& lags behind applied voltage somewhat less than 90à leads the applied voltage somewhat less than 90Ã& lags behind applied voltage by exactly 90Â&am leads the applied voltage by exactly 90Â& lags behind applied voltage somewhat less than 90à leads the applied voltage somewhat less than 90Ã& ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions is a dc motor provided with compensating winding used ? 1. Wide range of speed control above normal 2. Wide range of steady load variation with no speed control 3.Wide range of rapid variation in load Select the correct answer using the codes given below : Codes : 2 and 3 1, 2 and 3 1 and 3 1 and 2 2 and 3 1, 2 and 3 1 and 3 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machines have highest power factor with respect to magnetizing current? Any of the above. Closed slot type machines. Open slot type machines. Semi closed slot type machine. Any of the above. Closed slot type machines. Open slot type machines. Semi closed slot type machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous generator, if mechanical input is increased with constant excitation, the load angle will increase None of these either increase or decrease decrease increase None of these either increase or decrease decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Quadrature axis synchronous reactance is the ratio of Vmax to Imin. Vmin to Imax. Vmax to Imax. Vmin to Imin. Vmax to Imin. Vmin to Imax. Vmax to Imax. Vmin to Imin. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lamination of core are generally made of silicon steel. cast iron. carbon. stainless steel. silicon steel. cast iron. carbon. stainless steel. ANSWER DOWNLOAD EXAMIANS APP
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