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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 (Q)=10C

Time (t)=0.01s

Voltage =10milliV=10×10-6V

Step 2: Formula used-

Current =Qt, where Q is the charge and t is the time.

Potential difference (voltage)= Workdone(energy)charge

Step 3: Calculating current

Let us first calculate the current:

Current =Qt=100.01=1000A

Now, we know that:

Energy =voltage ×charge

On substituting the values in the given formula, we get:

=10×10-6×10=100×10-6=100milliJ

Therefore current would be 1000A and the energy would be 10milliJ.


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