A 5-ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire…
A 5-ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire is :
- $0.04 \mathrm{ohm}$
- $0.2 \mathrm{ohm}$
- $5 \mathrm{ohm}$
- $0.4 \mathrm{ohm}$
Solution
$\begin{aligned}
P & =I^2 R \\
\Rightarrow \quad & I=25 \times R \\
\Rightarrow \quad & R=\frac{1}{25}=0.04 \Omega
\end{aligned}$
Asked in: NEET 2005
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