MGVCL Exam Paper (30-07-2021 Shift 1)
What are the states of the three ideal diodes of the circuit shown in figure ?

D1 OFF, D2 ON, D3 ON
D1 ON, D2 OFF, D3 ON
D1 ON, D2 OFF, D3 OFF
D1 OFF, D2 ON, D3 OFF

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MGVCL Exam Paper (30-07-2021 Shift 1)
An RC series circuit with R = 150 Ω and C = 2 μF is excited by a DC source of 15 V by closing the switch at t = 0 with an initially uncharged capacitor. The initial and final voltages across the capacitor respectively are

0 V, 10 V
0 V, 15 V
10 V, 15 V
15 V, 10 V

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MGVCL Exam Paper (30-07-2021 Shift 1)
Insulation Power Factor testing on an oil-filled transformer is not helpful in determining ___

Turns ratio values
Movement of the windings (change in capacitance)
Whether the oil test indicates moisture
Condition of paper insulation (change in watts losses)

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MGVCL Exam Paper (30-07-2021 Shift 1)
A grid interactive solar system:

supplies power to as well as receives power from the grid as required
always supplies power to the grid
always receives power from the grid
works only when the grid fails

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