A-fuse-with-a-circular-cross-sectional-radius-of-0-15-mm-blows-at-15A-What-should-be-the-radius-of-the-cross-section-of-a-fuse-made-of-same-material-that-blows-at-30A-

Question Number 36529 by rahul 19 last updated on 03/Jun/18

A fuse with a circular cross - sectional

radius of 0.15 mm blows at 15 A . What

should be the radius of the cross section

of a fuse made of same material that

blows at 30 A ?

Answered by tanmay.chaudhury50@gmail.com last updated on 03/Jun/18

M o r e a r e a m o r e c u r r e n t r e q u i r e d

\frac{Π r_{1}^{2}}{Π r_{2}^{2}} = \frac{I_{1}}{I_{2}}

r_{2}^{2} = \frac{r_{1}^{2} \times I_{2}}{I_{1}} = \frac{0.15 \times 0.15 \times 30}{15}

r_{2} = 0.15 \times \sqrt{2}

Commented by rahul 19 last updated on 03/Jun/18

Thank you sir ��

Answered by math1967 last updated on 03/Jun/18

r a d i u s = \sqrt{\frac{. 15 \times . 15 \times 30}{15}} = . 15 \times \sqrt{2} m m

p l s . c h e c k a n s

Commented by rahul 19 last updated on 03/Jun/18

Correct!

Thanks sir .