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Current Electricity question

2004 · Q123
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Current Electricity question

2004 · Q123

NEETPhysicsCurrent ElectricityMCQ+4 / −1
Resistance n, each of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohms, equal to
  1. A
    n2R
  2. B
    R/n2
  3. C
    R/n
  4. D
    nR
View written solutionFree

Correct answer: A

R=rn⇒r=nRR = {r \over n} \Rightarrow r = nRR=nr​⇒r=nR

When connected in series, Req=nr{R_{eq}} = nrReq​=nr

= n (nR) = n2R

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