EXAMIANS
In which transformer, the tertiary winding is used?
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If in DC Shunt Motor the flux is reduced suddenly to zero, then
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When a transformer is loaded, the secondary terminal voltage drops. That means power factor is
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Two single-phase alternators operating in parallel have induced EMFs on open circuit of 230∠0° and 230∠10° volts and respective reactance of j2 Ω j3 Ω calculate the terminal voltage
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A 3-phase slip ring induction motor is wound for 4 poles on stator and 6 poles on the rotor. When 3-phase balanced voltage source at 50 Hz is applied, it will run at
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A generator may loose residual magnetism due to
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A 5 KVA transformer has a turns ratio of N1/N2 = 10. The impedance of primary winding is 3+j5 ohms while that of secondary winding is 0.5+j0.8 ohms. The impedance of transformer when referred to primary will be
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If in a sub – station there is one 132 / 33 kV transformer whose secondary is connected with primary of one 33 / 11 kV transformer, the total transformation ratio of the sub – station will be,
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Maximum efficiency will occur, when copper loss is_______to iron loss?
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Which type of motors are preferred in lifts?
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