You visited us 1 times! Enjoying our articles? Unlock Full Access!

Conductivity and Resistivity

The maximum c...

Question

The maximum current that flow in the fuse wire before it blows out, varies with the radius r as.

r^{3 / 2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

No worries! We‘ve got your back. Try BYJU‘S free classes today!

r^{2 / 3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

r^{1 / 2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $r^{3 / 2}$
As, $i^{2} R = h A$ $l^{2} (\frac{ρ L}{π r^{2}}) = h \times 2 π r l$
Thus
$i \propto r^{3 / 2}$ .

Suggest Corrections

Similar questions

I

r

r_{1}, r_{2}, r_{3}

\frac{1}{r_{1}} + \frac{1}{r_{2}} + \frac{1}{r_{3}} - \frac{1}{r}

J = a r^{2}

A B C

I

r

D, E, F

I

B C, C A

A B

r_{1}, r_{2} r_{3}

\frac{r_{1}}{r - r_{1}}_\frac{r_{2}}{r - r_{2}} + \frac{r_{3}}{r - r_{3}} = \frac{r_{1} r_{2} r_{3}}{(r - r_{1}) (r - r_{2}) (r - r_{3})}

r_{1}, r_{2}, r_{3}

A B C

r

r_{1} r_{2} r_{3} - r (r_{1} r_{2} + r_{2} r_{3} + r_{3} r_{1})

Join BYJU'S Learning Program