Question

In the circuit shown below in Fig. 8.45, calculate the
value of x if the equivalent resistance between the
points A and B is 4 Ohm.
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Answer 1

Answer:

Rnet = R1xR2/R1+R2

R1 = 8+4 = 12

R2 = x+5

Rnet = 4

(12)(x+5)/12+5+x = 4

12x + 60/17+x = 4

12x + 60 = 68 + 4x

8x = 8

x = 1