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Current Electricity question

2021 · Q140
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Current Electricity question

2021 · Q140

NEETPhysicsCurrent ElectricityMCQ+4 / −1
The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is 0.25Ω\OmegaΩ. What will be the effective resistance if they are connected in series?
  1. A
    4Ω\OmegaΩ
  2. B
    0.25Ω\OmegaΩ
  3. C
    0.5Ω\OmegaΩ
  4. D
    1Ω\OmegaΩ
View written solutionFree

Correct answer: A

R4{R \over 4}4R​ = .25

R = 1

Now these four resistances are arranged in series

RS = R + R + R + R = 4R

= 4 ×\times× 1 = 4Ω\OmegaΩ

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