MGVCL Exam Paper (30-07-2021 Shift 2)
In the circuit of figure, the switch is closed to position-1 for a long time. At t = 0 the switch position is changed from postion-1 to postion-2. Find an expression for the current i(t).

i(t) = (E/R) cos√(LC) t A
i(t) = (E/R) sin√(LC) t A
i(t) = (E/R) sin[1/√(LC)]t A
i(t) = (E/R) cos[1/√(LC)]t A

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MGVCL Exam Paper (30-07-2021 Shift 2)
Interposing current-transformer (CT) is used in differential protection of a transformer to

minimize the effect of saturation of the main CTs
limit the main CT secondary current
match the standard ratio of CTs used on both sides of the transformer winding
increase the sensitivity of the relay

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

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

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MGVCL Exam Paper (30-07-2021 Shift 2)
Which of the following does the term 'feeder automation' include?

substation reactive power control
feeder remote point voltage control
automatic reclosing
All of these

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