The maximum current that flows through a fuse wire before it blow… - Vidyadip

MCQ

The maximum current that flows through a fuse wire before it blows out varies with its radius as $[\ce{SCRA} \ 1998]$

A
$r^{3 / 2}$
B
$r$
C
$r^{2 / 3}$
✓
$r^{1 / 2}$

✓

Answer

Correct option: D.

$r^{1 / 2}$

$i=\frac{P}{V}=\frac{50}{250}=0.2 \ \mathrm{amp}$.

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