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

D1 ON, D2 OFF, D3 ON
D1 OFF, D2 ON, 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)
Insulation Power Factor testing on an oil-filled transformer is not helpful in determining ___

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

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MGVCL Exam Paper (30-07-2021 Shift 1)
The expression for voltage regulation of a short transmission line for lagging power factor is given by: ___, where, 'I' is the line current, 'V_r' is the receiving end voltage, 'R' is the line resistance and 'X' is the line reactance.

(IX cosφ_r + IR sinφ_r)/V_r
(IR cosφ_r + IX sinφ_r)/V_r
(IX cosφ_r - IR sinφ_r)/V_r
(IR cosφ_r - IX sinφ_r)/V_r

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