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A wire of length 60 cm is bent to into a...

A wire of length `60 cm` is bent to into a circle with a gap of `1 cm`. At its ends, on heating it by `100^(0)C`, the length of the gap increases to `1.02 cm`. `alpha of materials of wire is

A

`2 xx 10^(-4//@)C`

B

`4 xx 10^(-4//@)C`

C

`6 xx 10^(-4//@)C`

D

`1 xx 10^(-4//@)C`

Text Solution

Verified by Experts

The correct Answer is:
A
`alpha = (l_(2) - l_(1))/(l_(1)Deltat)` (gap can be taken as `l_(1)`)
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