Question

(Que) : — You know 5 June is celebrated every year as World Environment Day. As a part of its celebration , Vrinda and her two friends decided to have a cycling race to promote environmental friendly transport. They started at 12noon and took 3 minutes 20seconds , 3 minutes 40 seconds and 4 minutes respectively to cycle on a circular track. (a) If Vrinda and her friends started together at 12noon , then when will they meet together next ?​

Answer 1

Here Work done=Heat

Current=I=10A

Time=t=10s

Potential difference=V=15V

We know

\boxed{\sf Heat=VIt}

Heat=VIt

\begin{gathered}\\ \sf\longmapsto H=15\times 10\times 10\end{gathered}

⟼H=15×10×10

\begin{gathered}\\ \sf\longmapsto H=15\times 100\end{gathered}

⟼H=15×100

\begin{gathered}\\ \sf\longmapsto H=1500J\end{gathered}

⟼H=1500J

Work done here is 1500Joules