Find the value of Geq in the following circuit.

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SSC JE EE Previous Paper 8 (Held on: 28 Oct 2020 Morning)
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  1. 10 S
  2. 20 S
  3. 25 S
  4. 15 S

Answer (Detailed Solution Below)

Option 1 : 10 S
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Detailed Solution

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Concept:

Conductance (G) is the reciprocal of Resistance (R).

Unit of Conductance is siemens (S).

Calculation:

Given:

S1 = 6 S, S2 = 5 S, S3 = 20 S 

So, 

Shortcut Trick:-

In series

  • Resistance are added simple.
  • Conductance are inversely (1/S) added.

In parallel

  • Resistance are inversely (1/R) added.
  • Conductance are added simple.

So, conductance S­2 and S3 are in series

Added inversely S23 = (5*20)/(5+20)= 100/25 = 4 S

Now, S1 and S23  are parallel added simple

Seq = 6+4 =10 S 

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