Electrical Machines Speed of DC motor can be controlled by varying all of these. applied voltage. resistance of armature culture. its flux oer pole. all of these. applied voltage. resistance of armature culture. its flux oer pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When flux density is constant in a transformer, hysteresis loss varies as f V f² V² f V f² V² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve high efficiency. low starting torque. reduced size. quick acceleration. high efficiency. low starting torque. reduced size. quick acceleration. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound? 541.67V, 250 rpm. 2166.67V, 270 rpm. 2166.67V, 230 rpm. 541.67V, 200 rpm. 541.67V, 250 rpm. 2166.67V, 270 rpm. 2166.67V, 230 rpm. 541.67V, 200 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increases in field excitation of a DC generator, its generated emf decreases. remains constant. increases. increases upto a limit and then remains almost constant. decreases. remains constant. increases. increases upto a limit and then remains almost constant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If we increase the rotor reactance value, the maximum torque will None of these not changed decrease increase None of these not changed decrease increase ANSWER DOWNLOAD EXAMIANS APP
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