Electrical Machines Which of the following is not a part of transformer? Commutator. Tap changer. Radiator. Conservator tank. Commutator. Tap changer. Radiator. Conservator tank. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of a conductively compensated DC series motor, the compensating winding is provided As a separate unit. In parallel with the armature winding. In parallel with the field winding. In series with the armature winding. As a separate unit. In parallel with the armature winding. In parallel with the field winding. In series with the armature winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the phase difference between two windings of A.C servomotor ? 30°. 90°. 60°. 120°. 30°. 90°. 60°. 120°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 57.1%. 88.8%. 59.2%. 48.0%. 57.1%. 88.8%. 59.2%. 48.0%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Induction motor operation depends on stationary magnetic field. rotating magnetic field. None of these either of these. stationary magnetic field. rotating magnetic field. None of these either of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When R2 is rotor resistance, X2 the rotor reactance at supply frequency and s the slip, then the condition for maximum torque under running condition will be sR2 = X2. R2 = sX2. R2 = s2X2. R2 = s2X2. sR2 = X2. R2 = sX2. R2 = s2X2. R2 = s2X2. ANSWER DOWNLOAD EXAMIANS APP
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