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Q.

If three wires of equal resistance are given then number of combinations they can be made to give different resistance is

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answer is 4.

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Detailed Solution

No. of combinations (equal resistance)
$2^{n - 1} \Rightarrow 2^{3 - 1} \Rightarrow 2^{2} \Rightarrow 4$

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If three wires of equal resistance are given then number of combinations they can be made to give different resistance is