MGVCL Exam Paper (30-07-2021 Shift 2)
A coil having an inductance of 100 mH is magnetically coupled to another coil having an inductance of 900 mH. The coefficient of coupling between the coils is 0.45. Calculate the equivalent inductance if the two coils are connected in series opposing.

932 mH
1270 mH
730 mH
1135 mH

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MGVCL Exam Paper (30-07-2021 Shift 2)
A three-phase 400 V, 6-pole, 50 Hz squirrel-cage induction motor is running at a slip of 5%. The speed of rotor with respect to stator magnetic field and speed of the stator magnetic field with respect to rotor magnetic field are

-50 rpm, zero
950 rpm, 1000 rpm
950 rpm, zero
-50 rpm, 1000 rpm

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MGVCL Exam Paper (30-07-2021 Shift 2)
If no load is connected to solar PV system,

it will dissipate energy in the panel and increase its temperature
its voltage will go on increasing till its breakdown
it will stop absorbing light
it will start reflecting the light

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