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.

1135 mH
730 mH
932 mH
1270 mH

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MGVCL Exam Paper (30-07-2021 Shift 2)
Thermocouples can be connected in series/parallel to obtain greater sensitivity called as

Thermopile
Thermometer
None of these
Thermistor

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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
increase the sensitivity of the relay
match the standard ratio of CTs used on both sides of the transformer winding

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