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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