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SSC JE Electrical 2019 with solution SET-2

SSC JE Electrical 2019 with solution SET-2
 The number of valence electrons of P and Si are respectively?

4 and 4
4 and 5
3 and 4
5 and 4

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Phosphorus (P) has 15 electron i.e 2,8,5. Hence the number of electron in its outermost orbit is 5.
Silicon (Si) has 14 electron i.e 2,8,4. Hence the number of electrons in its outermost orbit is 4.

SSC JE Electrical 2019 with solution SET-2
The input for a condenser in a steam power plant comes from a/an

Air preheater
Turbine
Super heater
Economizer

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Condenser – Condenser is a heat exchanger in which cooling water is circulated through the tubes. The exhaust steam from the turbine enters the condenser where it is cooled and converted to condensate (water).
 


SSC JE Electrical 2019 with solution SET-2
Under no-load conditions in transmission lines, the receiving end voltage is greater than the sending end voltage. This effect is called

Corona effect
Proximity effect
Skin effect
Ferranti effect

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SSC JE Electrical 2019 with solution SET-2
A circuit consists of two parallel resistors, having a resistance of 20Ω and 30Ω respectively connected in series with 15Ω. If the current through the 15Ω resistor is 3A, then find the current through 20Ω and 30Ω resistors respectively?

1A, 2A
1.2A, 1.8A
1.8A, 1.2A
2A, 1 A

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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?

4 meters
2.5 meters
1.5 meters
2 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
  If two impedances are given as Z1 = 20∠60° and Z2 = 5∠30°, then Z1/Z2 = ?

5∠30°
100∠120°
100∠30°
4∠30°

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

please check below image for solution.


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