A) \[740\text{ }J\]
B) \[437.5\text{ }J\]
C) \[540\text{ }J\]
D) \[637.5\text{ }J\]
Correct Answer: B
Solution :
\[\frac{L\Delta T}{\Delta t}=25\] |
\[\Rightarrow \] \[L=\frac{25\times 1}{15}=\frac{5}{3}\] |
\[\Delta U=\frac{1}{2}L(I_{f}^{2}-I_{1}^{2})=\frac{1}{2}\times \frac{5}{3}\times ({{25}^{2}}-{{10}^{2}})\] |
\[=\frac{5}{6}\times 525=437.5J.\] |
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