Electrical Machines If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by sf. sf / 2. f / s. s2. sf. sf / 2. f / s. s2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following generators negative voltage regulation can occur? both B and C series generators over compound generator shunt generator both B and C series generators over compound generator shunt generator ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What will be the e.m.f. generated by a 4 pole lap connected DC Generator rotating at 1500 r.p.m.? Its flux per pole is 0.4 mWb and total no of armature conductors is 1000. 20 volts. 30 volts. 40 volts. 10 volts. 20 volts. 30 volts. 40 volts. 10 volts. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ wound rotor induction motor the short circuit gear is used to short circuit the None of these stator phases of the motor. starting resistance in the starter. rotor at slip rings. None of these stator phases of the motor. starting resistance in the starter. rotor at slip rings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is increased. modified. reversed. none of these. increased. modified. reversed. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An electric motor with constant output power will have a torque speed characteristics in the form of a Straight line parallel to the speed axis. Straight line through the origin. Circle about the origin. Rectangular hyperbola Straight line parallel to the speed axis. Straight line through the origin. Circle about the origin. Rectangular hyperbola ANSWER DOWNLOAD EXAMIANS APP
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