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In a lightning strike, a charge of 18 coulombs is transferred in 0.02 seconds at a potential...

Question:

In a lightning strike, a charge of 18 coulombs is transferred in 0.02 seconds at a potential difference of 1,500,000 volts. What is the average current?

Electric Current:

Electric current is a measure of the flow of charge through a given point with time. That is, electric current is the charge flowing per unit time. The current has unit symbol, A.

Answer and Explanation:

By definition average electric current is average amount of charge per unit time;

{eq}\begin{align*} Average\ Current &= \frac{\Delta Q}{\Delta t} & \text{[Q is the amount of charge, t is the time]}\\ &= \frac{18\ C}{0.02\ s}\\ &= 900\ C/s\\ &= 900 A \end{align*} {/eq}

The average current is 900 A.


Learn more about this topic:

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What is Electric Current? - Definition, Unit & Types

from CLEP Natural Sciences: Study Guide & Test Prep

Chapter 6 / Lesson 7
310K

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