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Q.

The resistance of the wire is 121 ohm. It is divided into ‘n’ equal parts and they are connected in parallel, then effective resistance is 1 ohm. The value of ‘n’ is

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a

11

b

13

c

12

d

3

answer is C.

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Detailed Solution

 Resistance of each part=121nΩ

After parallel connection,

Req=121n×1n

Given : 1=121n2

⇒n=11

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