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SSC JE Electrical 2019 with solution SET-2

SSC JE Electrical 2019 with solution SET-2
Which of the following is NOT an expression to find self-inductance?

Nφ/I
Nφ
N2/S
N2μoμrA/I

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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?

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

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

SSC JE Electrical 2019 with solution SET-2
In Boolean algebra (A. Ā) + A

1
0
A
Ā

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

According to Boolean algebra law
A. Ā = A
A + A = A
Therefore in the given question
(A. Ā) + A = A + A = A
 

SSC JE Electrical 2019 with solution SET-2
In a 4 pole. 20 kW, 200 V wave wound DC shunt generator, the current in each parallel path will be

100 A
10 A
25 A
50 A

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Given
Power (P) = 20 kW = 20 × 103 W
Voltage (V) = 200 V
P = VI = I = P/V
I = (20 × 103)/200
I = 100A
For wave wound No. of Parallel Path = 2
Current in Each parallel Path for wave wound
I = 100/2 = 50 A
 

SSC JE Electrical 2019 with solution SET-2
A transistor can be made to operate as a switch by operating it in which of the following regions?

Active region, saturation region
Saturation region, cut-off region
Active region
Active region, cut-off region

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SSC JE Electrical 2019 with solution SET-2
In a suspension type insulator the voltage…..?

Across the center disc is maximum
Across the top disc is maximum
Across the top disc is minimum
Across the center disc is minimum

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