Electrical Machines In DC generator on no-load, the air gap flux distribution in space is pulsating. flat topped. triangular. sinusoidal. pulsating. flat topped. triangular. sinusoidal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/2. PN/60. PN/3000. PN/120. PN/2. PN/60. PN/3000. PN/120. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increases in field excitation of a DC generator, its generated emf decreases. increases. increases upto a limit and then remains almost constant. remains constant. decreases. increases. increases upto a limit and then remains almost constant. remains constant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronous reactance of an alternator represents a reactance operating at synchronous speed field winding reactance All of these armature reactance and leakage reactance a reactance operating at synchronous speed field winding reactance All of these armature reactance and leakage reactance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If Kh is hysteresis constant, f is supply frequency, Bm maximum flux density in core of transformer, the expression of hysteresis loss in transformer, is given by Khf2Bm1.6. KhfBm3. KhfBm. KhfBm1.6. Khf2Bm1.6. KhfBm3. KhfBm. KhfBm1.6. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motors, there is large decrease in maximum power factor when the dispersion coefficient is ________________. remains same. increased. decreased. kept constant to certain value. remains same. increased. decreased. kept constant to certain value. ANSWER DOWNLOAD EXAMIANS APP
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