Electrical Machines In a dc machine 72 number of coils are used. Find the number of commutator segments required? 37 72 74 36 37 72 74 36 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A Shunt generator running at 1000 rpm has generated emf of 100 V. If the speed increases to 1200 rpm, the generated emf will be nearly 140 V 120 V 175 V 240 V 140 V 120 V 175 V 240 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to f2 f V V2 f2 f V V2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt generator builds up 230 V when driven in clockwise direction. In case it is driven in anti clockwise direction, other things remaining unchanged, then the voltage build up is 230 V some what less than 230 V some what more than 230 V not possible 230 V some what less than 230 V some what more than 230 V not possible ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is increased, the power factor is unity power factor None of these lagging power factor leading power factor unity power factor None of these lagging power factor leading power factor 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 voltage magnitude same prime mover speed same frequency same phase sequence same voltage magnitude same prime mover speed same frequency same phase sequence ANSWER DOWNLOAD EXAMIANS APP
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