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A piece of wire resistance R is cut into...

A piece of wire resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’ then the ratio R/R' is

A

I/25

B

I/5

C

5

D

25

Text Solution

Verified by Experts

The correct Answer is:
D
Now, resistance of each wire is R/5.
Equivalent resistance is given by `1/(R.)=5/R+5/R+5/R+5/R+5/R=25/R`
`R/(R.)=25`.
Therefore, the right option is d. 25.
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Knowledge Check

  • A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R' then the ratio R/R' is -

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