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Network Elements and the Concept of Circuit

  1. Find the value of R so that V2 = 2 volt—
    1. 6
      5
    2. 5
      6
    3. 2 Ω
    4. 5 Ω
Correct Option: B

Given circuit

Apply KCL at node A

I 1 + 4 = 2 I1 +
V2
R

or 4 -
2
= I1 (V2 = 2V)
R

4 – 2
=
8
= 5
R5

∵ I1 =10 - 2 = 8
55

or
4R – 2
=
8

R5

or 20 R – 10 = 8 R
or (20 – 8) R = 10
or 12 R = 10
or R =
10
=
5

126



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