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MGVCL Exam Paper (30-07-2021 Shift 3)

MGVCL Exam Paper (30-07-2021 Shift 3)
The current in the coil of a large electromagnet falls from 6 A to 2 A in 10 ms. The induced emf across the coil is 100 V. Find the self-inductance of the coil.

0.25 H
0.75 H
0.5 H
1.25 H

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Equation of self inductance:
V = Ls*(di/dt)
Ls = V/(di/dt)
= 100/((6 - 2)/(0.01))
= 0.250 H
= 250 mH

MGVCL Exam Paper (30-07-2021 Shift 3)
Tiger Woods is associated with which of the following fields?

Literature
Politics
Sports
Cinema

ANSWER DOWNLOAD EXAMIANS APP

MGVCL Exam Paper (30-07-2021 Shift 3)
What items should be considered when looking at a site for a new transformer installation?

All of these
Soils Report
Environmental impact
Site Survey

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Points should be consider for new transformer installation:
Location
Environmental impact
Soils condition
Survey of land
Ventilation
Grounding
Wiring
Fluid check
Inspection

MGVCL Exam Paper (30-07-2021 Shift 3)
Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 400 W and -50 W. Calculate the reactive power taken by the load

350/√3 VAR
350√3 VAR
450√3 VAR
450/√3 VAR

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Reactive power taken (Q) = √3*(W1 - W2)
= √3*(450 + 50)
= √3*450 kVAR

MGVCL Exam Paper (30-07-2021 Shift 3)
Which of the following medium is used between CPU and RAM to speed up the processing power of a CPU?

Virtual memory
DRAM
Flash memory
Cache memory

ANSWER DOWNLOAD EXAMIANS APP

MGVCL Exam Paper (30-07-2021 Shift 3)
દ્રશ્ય' શબ્દનો વિરુદ્ધાર્થ શબ્દ આપેલો વિકલ્પોમાંથી કયો છે?

દ્રષ્ટિવંત
દ્રશ્યમાન
અદ્રશ્ય
દ્રષ્ટિ

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