A wire of $20 \Omega$ is immersed in ice. If $10 \mathrm{~A}$ current is passed through this wire for 1 minute, ice completely melts. The mass of the ice is nearly $\left(L_{ ext {ice }}=79.7 \mathrm{calg}^{-1} ight)$

Question

A wire of $20 \Omega$ is immersed in ice. If $10 \mathrm{~A}$ current is passed through this wire for 1 minute, ice completely melts. The mass of the ice is nearly $\left(L_{	ext {ice }}=79.7 \mathrm{calg}^{-1}ight)$

Aicharya · Accepted Answer

$\begin{aligned} 	ext { Heat gained } & =	ext { Heat generated } \ m L & =I^2 R t \ \Rightarrow \quad m & =\frac{I^2 R t}{L} \ & =\frac{100 	imes 20 	imes 60}{79.7 	imes 4.2} \quad(\because 1 \mathrm{cal}=4.2 \mathrm{~J}) \ & =359 \mathrm{~g}\end{aligned}$

A wire of $20 \Omega$ is immersed in ice. If $10 \mathrm{~A}$ current is passed through this wire for 1…

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