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Combination of Resistors question from NEET 2021

Q45NEET 2021Easy

Combination of Resistors

The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is 0.25 $\Omega$ . What will be the effective resistance if they are connected in series?

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Answer: (a)

Identical wires, each $r$ : parallel $r/4 = 0.25\ \Omega \Rightarrow r = 1\ \Omega$ .
Series: $4r = 4\ \Omega$ . The answer is (a).

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