Question

the equivalent resistance between points A and B in the figure is 1 .
what is the value of unknown resistance R:​

Answer 1

$\huge\underline\mathfrak\purple{Answer}$

1 ohm and 2 ohm resistances are in series in both the arms , so

R' = 1+2 = 3 ohm

The three resistances hence formed will be in parallel so ,

$\frac{1}{1} = \frac{1}{3} + \frac{1}{3} + \frac{1}{R} \\ \\ 1 = \frac{2}{3} + \frac{1}{R} \\ \\ 1 - \frac{2}{3} = \frac{1}{R} \\ \\ \frac{1}{3} = \frac{1}{R}$

R = 3 ohm

Thanks!

Answer 2

Answer:

3 ohm is the answer

Explanation:

The explanation is attached above.

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