Electrical Machines Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H? 0 V 1 V 2 V 4 V 0 V 1 V 2 V 4 V 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 phase sequence same frequency same prime mover speed same voltage magnitude same phase sequence same frequency same prime mover speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed? Zero 15.6 Nm 15.28 Nm 16.55 Nm Zero 15.6 Nm 15.28 Nm 16.55 Nm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To avoid formation of grooves in the commutator brush position has no effect on the commutator grooving. None of these the brushes of same polarity should track each other. the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. None of these the brushes of same polarity should track each other. the brushes of opposite polarity should track each other. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a step down transformer which one of the following statements is true? Secondary power is less than primary power. Number of secondary turns is more than that of primary. Secondary current is less than primary current. Number of secondary turns is less than primary turns. Secondary power is less than primary power. Number of secondary turns is more than that of primary. Secondary current is less than primary current. Number of secondary turns is less than primary turns. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When an electric train is moving down a hill, the DC motor will operate as DC series generator. DC shunt motor. DC series motor. DC shunt generator. DC series generator. DC shunt motor. DC series motor. DC shunt generator. ANSWER DOWNLOAD EXAMIANS APP
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