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If n resistors with RΩR\OmegaRΩ​ each as resistance are connected in parallel, then the equivalent resistance of the network is:
Question

If n resistors with RΩR\Omega​ each as resistance are connected in parallel, then the equivalent resistance of the network is:

A.

RnΩ\frac{R}{n}\Omega​​

B.

RnΩR^n \Omega​​

C.

nRΩ\frac{n}{R}\Omega​​

D.

n×RΩn \times R \Omega​​

Correct option is A

The correct answer is  (A)Rn Ω \frac{R}{n} \,Ω

Explanation:

Whennnresistors, each with resistanceRΩ​, are connected in parallel, the formula for the equivalent resistanceReqR_{\text{eq}}​ is given by:

1Req=1R+1R+(nterms)=nR1Req=1R+1R+⋯(n terms) = \frac{n}{R}​​

Thus, the equivalent resistance becomes:

Req=RnReq= \frac{R}{n}​​

So, the equivalent resistance ofnnresistors connected in parallel is 

Information Booster:

  • The formula for parallel resistors is derived from the inverse sum of individual resistances.

  • Fornnresistors of resistanceR, the total resistance reduces with the increase in the number of resistors.

  • The equivalent resistance decreases as more resistors are added in parallel.

  • This is useful in circuits requiring a lower resistance for current flow.

  • Parallel resistances always result in a value lower than any individual resistance.

  • The relationship is reciprocal, meaning as the number of resistors increases, the equivalent resistance approaches zero.

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