For a circuit shown below calculate the value of i 1?

For a circuit shown below calculate the value of i 1?
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For a circuit shown below calculate the value of i1?

A. <span class="math-tex">\(\frac{{43}}{{160}}mA\)</span>

B. <span class="math-tex">\(\frac{{117}}{{32}}\;mA\)</span>

C. <span class="math-tex">\(\frac{{117}}{{22}}mA\)</span>

D. <span class="math-tex">\(\frac{{117}}{{11}}mA\)</span>

Please scroll down to see the correct answer and solution guide.

Right Answer is: A

SOLUTION

Diagram

Let i1 and i2 are in mA.

By applying KVL in loop 1,

10 (i2 – i1) – 0.7 - (11 i1) = 0

⇒ 10 i2 – 21 i1 = 0.7       ---(1)

By applying KVL in loop 2,

10 i2 + 10 (i2 – i1) – 10 = 0

2 i2 –  i1 = 1       ---(2)

From equations (1) and (2),

\({i_1} = \frac{{43}}{{160}}\;mA\)