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A time wire with a circuit-sectional rad...

A time wire with a circuit-sectional radius of `0.02mm` blows with a current of `5` ampere for what current another fuse wire made from the same material with cross-section radius of `0.04` mm will blow?

A

`14.7A`

B

`5A`

C

`3A`

D

`1.5 A`

Text Solution

Verified by Experts

The correct Answer is:
a
`I_(2) = I_(1) ((r_(2))/(r_(1)))^(3//2) = 5 ((0.04)/(0.02))^(3//2) = 14.7A`
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