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Physics · PYQ NEET UG 2021
हिन्दीThe 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?
Correct answer · Option 3
\( 4\,\Omega \)
Explanation
Let each wire have resistance \( R \). For 4 wires in parallel: \( R_{p} = \frac{R}{4} = 0.25\,\Omega \Rightarrow R = 1\,\Omega \). For 4 wires in series: \( R_{s} = 4R = 4 \times 1 = 4\,\Omega \).
