Electrical Machines No load primary current in a transformer lags behind applied voltage somewhat less than 90à leads the applied voltage by exactly 90Â& leads the applied voltage somewhat less than 90Ã& lags behind applied voltage by exactly 90Â&am lags behind applied voltage somewhat less than 90à leads the applied voltage by exactly 90Â& leads the applied voltage somewhat less than 90Ã& lags behind applied voltage by exactly 90Â&am ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous speed of an induction motor will be increased by increasing number of poles. increasing of frequency. decreasing of frequency. speed can not be increased. increasing number of poles. increasing of frequency. decreasing of frequency. speed can not be increased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is 340 A. 570 A. 440 A. 250 A. 340 A. 570 A. 440 A. 250 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is not a necessary condition to be satisfied for synchronising an incoming alternator to an already operating alternator? same phase sequence same frequency same prime mover speed same voltage magnitude same phase sequence same frequency same prime mover speed same voltage magnitude ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines There are two 2-pole DC machines. Main field axis of machine A is horizontal and that of B is vertical. It is preferable to purchase none of these any of the two machines machine B machine A none of these any of the two machines machine B machine A ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ideal value of voltage regulation of a device is? ∞ 0 a finite negative value a positive finite value ∞ 0 a finite negative value a positive finite value ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS