Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? None of these GNA either GNA or MNA MNA None of these GNA either GNA or MNA MNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The external resistance to be added in the armature circuit to limit the armature current to 125% of its rated value is 15.1 Ω 31.1 Ω 31.9 Ω 15.9 Ω 15.1 Ω 31.1 Ω 31.9 Ω 15.9 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In auto transformer if the turn ratio is K, what is the power transferred inductively? K × input power None of these both A and B (1-K) × input power K × input power None of these both A and B (1-K) × input power ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What are slot wedges in a DC machine made of? Fibre. Cast iron. Mild steel. Silicon steel. Fibre. Cast iron. Mild steel. Silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5 Ω and back emf of 200 V is 400 A. 44 A. 440 A. 40 A. 400 A. 44 A. 440 A. 40 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3-phase induction motor, if the supply voltage and frequency are reduced by the same ratio, then slip at which maximum torque occurs is more and maximum torque decreases more and maximum torque remains constant less and maximum torque increases less and maximum torque decreases more and maximum torque decreases more and maximum torque remains constant less and maximum torque increases less and maximum torque decreases ANSWER DOWNLOAD EXAMIANS APP
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