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

MGVCL Exam Paper (30-07-2021 Shift 3)
The magnetizing inrush current in a transformer is rich in the harmonic component.

fifth
seventh
third
second

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

2nd harmonics contains - 60 to 55 %
3rd harmonics contains - 40 - 50%

MGVCL Exam Paper (30-07-2021 Shift 3)
Which is the function of Operating System?

Process Management
Security
All of these
Devices Management

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MGVCL Exam Paper (30-07-2021 Shift 3)
When was the Constitution of India adopted by the Constituent Assembly?

13th January 1950
15th August 1947
26th November 1949
January 25 1930

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MGVCL Exam Paper (30-07-2021 Shift 3)
If the phase velocity of a plane wave in a perfect dielectric is 0.4 times its value in free space, then what is the relative permittivity of the dielectric?

6.25
4.25
1.25
2.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The equation is given by:
Vp (Phase velocity) = (Velocity of light in free space/Phase velocity)²
= (1/0.4)²
= 6.25

MGVCL Exam Paper (30-07-2021 Shift 3)
A 10-pole induction motor is supplied by a 6-pole alternator, which is driven at 1400 rpm. If the motor runs with a slip of 5%, what is its speed?

882 rpm
1575 rpm
798 rpm
1425 rpm

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Slip of the induction motor,
S = (Ns - Nr)/Ns
Ns = (120*f)/P
Poles (P) = 6

1400 = (120*f)/6
f = 70 Hz
For P = 10
Ns = (120*70)/10
= 840 rpm
Nr = Ns(1 - S)
= 840*(1 - 0.05)
= 798 rpm

MGVCL Exam Paper (30-07-2021 Shift 3)
As per Stockholm International Peace Research Institute (SIPRI) report 2019 for the period 2014-2018, which country is the largest arms importer in the world?

India
Saudi Arabia
Germany
Myanmar

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