MGVCL Exam Paper (30-07-2021 Shift 2)
If the velocity of electromagnetic wave in free space is 3 × 10⁸ m/s, then the velocity in a medium with εr of 4.5 and μr of 2 would be

27 × 10⁸ m/s
1 × 10⁸ m/s
3 × 10⁸ m/s
9 × 10⁸ m/s

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

MGVCL Exam Paper (30-07-2021 Shift 2)
The voltage applied to a transformer primary is increased keeping V/f constant. With this, the core loss ____ and the magnetizing current (Im) ____

decreases, increases
increases, remains constant
increases, increases
remains constant, decreases

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

MGVCL Exam Paper (30-07-2021 Shift 2)
The magnitude of the generator earth-fault current is limited by

controlling field exciter
inserting suitable resistance in neutral grounding circuit
inserting the stabilizing resistance in series with the relay
using higher rating CTs

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP