Electrical Machines Which of the following is/are effects of armature reaction? increases the design cost increase the iron loss All of these increase the maintenance and repair increases the design cost increase the iron loss All of these increase the maintenance and repair ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is 5.7 ohms. 2.2 ohms. 6 ohms. 1.9 ohms. 5.7 ohms. 2.2 ohms. 6 ohms. 1.9 ohms. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loss will depends on f f1.6 f³ f² f f1.6 f³ f² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC shunt motor if load is increased, the speed reduce slightly. increased slightly. remains constant. increase proportional. reduce slightly. increased slightly. remains constant. increase proportional. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following bearings and their uses are correct neither 1 nor 2 both A and B roller bearings → large machines ball bearings → small machines neither 1 nor 2 both A and B roller bearings → large machines ball bearings → small machines ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increases in field excitation of a DC generator, its generated emf increases upto a limit and then remains almost constant. increases. remains constant. decreases. increases upto a limit and then remains almost constant. increases. remains constant. decreases. ANSWER DOWNLOAD EXAMIANS APP
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