Question

# A flash of lightning carries $10C$ Of charge which flows for $0.01s$. What Is the current? If the voltage Is $10mV$, What Is the energy?

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Solution

## Step 1: Given data-Charge $\left(Q\right)=10C$Time $\left(t\right)=0.01s$Voltage $=10milliV=10×{10}^{-6}V$Step 2: Formula used-Current =$\frac{Q}{t}$, where $Q$ is the charge and $t$ is the time.Potential difference (voltage)= $\frac{Workdone\left(energy\right)}{charge}$Step 3: Calculating currentLet us first calculate the current:Current =$\frac{Q}{t}$=$\frac{10}{0.01}=1000A$Now, we know that:Energy =voltage $×$charge On substituting the values in the given formula, we get:$=10×{10}^{-6}×10\phantom{\rule{0ex}{0ex}}=100×{10}^{-6}\phantom{\rule{0ex}{0ex}}=100milliJ$Therefore current would be $1000A$ and the energy would be $10milliJ$.

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