Electrical Machines In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses? 3KW 0.5Kw 1.5KW 2KW 3KW 0.5Kw 1.5KW 2KW ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At what power factor, the voltage regulation of a transformer can be zero ? Unity power factor. Zero power factor. Lagging power factor. Leading power factor. Unity power factor. Zero power factor. Lagging power factor. Leading power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous machine has P number of poles, find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm)? ωe = ωm ωe = 2/P*ωm ωe = P*ωm ωe = P/2*ωm ωe = ωm ωe = 2/P*ωm ωe = P*ωm ωe = P/2*ωm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator pitches of duplex and simplex lap windings are respectively 2 and 1 2 and 2 4 and 2 4 ang 1 2 and 1 2 and 2 4 and 2 4 ang 1 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor is clockwise when it is supplied with 3 - Φ sinusoidal voltage having phase sequence A - B - C. For counterclockwise rotation of motor, the phase sequence of the supply should be C - A - B. A - C - B. B - C - A or C - A - B. B - C - A. C - A - B. A - C - B. B - C - A or C - A - B. B - C - A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two transformers operating in parallel will share the load depending on their per unit impedance efficiency ratings leakage reactance per unit impedance efficiency ratings leakage reactance ANSWER DOWNLOAD EXAMIANS APP