Electrical Machines When an electric train is moving down a hill, the DC motor will operate as DC series generator. DC shunt motor. DC shunt generator. DC series motor. DC series generator. DC shunt motor. DC shunt generator. DC series motor. 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 KhfBm1.6. Khf2Bm1.6. KhfBm. KhfBm3. KhfBm1.6. Khf2Bm1.6. KhfBm. KhfBm3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? 20 Hz. 35 Hz. Can be determined. 30 Hz. 20 Hz. 35 Hz. Can be determined. 30 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Induction motors provided with open slots have more breakdown torque. leading power factor. higher efficiency. less breakdown torque. more breakdown torque. leading power factor. higher efficiency. less breakdown torque. 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 B - C - A. A - C - B. C - A - B. B - C - A or C - A - B. B - C - A. A - C - B. C - A - B. B - C - A or C - A - B. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 250 V DC generator in run at rated speed with no excitation. The open circuit voltage will be 250 V. zero. very small, say about 2 or 3 V. about 100 V. 250 V. zero. very small, say about 2 or 3 V. about 100 V. ANSWER DOWNLOAD EXAMIANS APP
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