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SSC JE Electrical 2019 with solution SET-2

SSC JE Electrical 2019 with solution SET-2
Observe the given network and answer the question? The potential at point a = ?

I3R3
E1 − I1R1
I2R2
E1 − I1R1 & I3R3

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

For the given network the potential at point a can be found by applying KVL.
For loop 1
Va = E1 − I1R1
Va = I3R3
For loop 2
Va = E2 − I2R2
 


SSC JE Electrical 2019 with solution SET-2
  If two impedances are given as Z1 = 20∠60° and Z2 = 5∠30°, then Z1/Z2 = ?

4∠30°
100∠30°
5∠30°
100∠120°

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

please check below image for solution.


SSC JE Electrical 2019 with solution SET-2
The candle power of a lamp placed normal to a working plane is 60 CP. Find the distance if the illumination is 15 lux?

2 meters
1.5 meters
4 meters
2.5 meters

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Candle Power of lamp = 60 CP
Illumination of lamp = 15 lux
Distance(D) = ? meters
Illumination of lamp = (candle power)/(distance)2
(D)2 = candle power/Illumination of lamp
(D)2 = 60/15 =4
D = √4
D = 2
 

SSC JE Electrical 2019 with solution SET-2
Which of the following is an important feature of a 3-phase synchronous motor?

Low starting current
Low starting torque
No starting torque
High starting torque

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Synchronous motors are not self-starting. The DC source is applied to the rotor of the synchronous Motor.

SSC JE Electrical 2019 with solution SET-2
Oxygen is a/an ____ gas?

Paramagnetic
Inert
Ferromagnetic
Diamagnetic

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Atoms or ions with unpaired electrons are attracted to a magnetic field; the more unpaired electrons, the greater is the attraction. Such substances are called paramagnetic. Molecular oxygen is a paramagnetic gas by virtue of its two unpaired electrons.
 

SSC JE Electrical 2019 with solution SET-2
Which of the following generators offers the poorest voltage regulation?

Shunt
Differential compounded
Series Motor
Cumulative compounded

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