Electrical Machines Voltage across the open circuited field termninals of a synchorous machine under slip test is DC of slip frequency. AC of supply frequency. A modulated supply frequency AC voltage with slip frequency envelop. DC. DC of slip frequency. AC of supply frequency. A modulated supply frequency AC voltage with slip frequency envelop. DC. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under commutation results in no sparking. sparking at the leading edge of the brush. sparking the trailing edge of the brush. sparking at the middle of the brush. no sparking. sparking at the leading edge of the brush. sparking the trailing edge of the brush. sparking at the middle of the brush. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a three phase induction motor has an impedance of 0.4 + j4 ohm per phase at standstill the maximum torque occurs at a slip of _____________. 25 %. 15 %. 10 %. 50 %. 25 %. 15 %. 10 %. 50 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If B is flux density, l the length of the conductor and v the velocity of the conductor, then emf is given by Bl2v. Bl2v2. Blv2. Blv. Bl2v. Bl2v2. Blv2. Blv. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to V2 f2 V f V2 f2 V f ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor? 30 rpm 1500 rpm zero 1470 rpm 30 rpm 1500 rpm zero 1470 rpm ANSWER DOWNLOAD EXAMIANS APP
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