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Doubt & Answer Explanation

Doubt

Answer Explanation

The figure below shows the question you are talking about.

Now let R? denote the resistance between the points A and B. Since we are talking about the chain extending to infinity, removing or adding one loop won't make a difference to the total resistance between A and B. So we can represent the above figure by the following figure too.

Hence, we can say that:

R? = equivalent resistance of the circuit shown above. The equivalent resistance of the second branch is R + R + R? since these three resistances (R, R and R? ) are in series.

The net equivalent resistance therefore = R(2R+R?)/(R+2R+R?) = R?

Solve this equation to get the value of R?.

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Doubt & Answer Explanation

Doubt

Answer Explanation

Complete IIT JEE, AIEEE & BITSAT 2012 Online Course + Postal Correspondence Course + 36 DVD Set + Online Faculty Support