Electrical Machines For the speed control of polyphase squirrel cage induction motor, if frequency of operation is decreased with None of these either of these constant supply voltage V, starting torque Tst decreases constant V, Tst increases None of these either of these constant supply voltage V, starting torque Tst decreases constant V, Tst increases 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 88.8%. 57.1%. 48.0%. 59.2%. 88.8%. 57.1%. 48.0%. 59.2%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power developed by salient pole synchronous machine is/are both 1 and 2 excitation power only power due to saliency or reluctance only None of these both 1 and 2 excitation power only power due to saliency or reluctance only None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following relation is correct? Xd = Xq. None of these Xd > Xq. Xd < Xq. Xd = Xq. None of these Xd > Xq. Xd < Xq. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Diverters are used only in None of these shunt motors either of these series motors None of these shunt motors either of these series motors ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Where the shunt generators are widely used? Where often load fluctuation is occurred. Where voltage variation is needed over a wide load range. Where a constant voltage is required over a narrow load range. Where the load is very high. Where often load fluctuation is occurred. Where voltage variation is needed over a wide load range. Where a constant voltage is required over a narrow load range. Where the load is very high. ANSWER DOWNLOAD EXAMIANS APP
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