1.

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

Answer»

I/25
I/5
5
25

Solution :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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