Question Video: Recalling the Formula for Electric Current | Nagwa Question Video: Recalling the Formula for Electric Current | Nagwa

# Question Video: Recalling the Formula for Electric Current Science • Third Year of Preparatory School

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The mathematical expression current = ⋅⋅⋅/time is an equation with three quantities in it. Two of the quantities have been filled in, current and time. What quantity goes in the numerator of the fraction?

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### Video Transcript

The mathematical expression current equals dot dot dot divided by time is an equation with three quantities in it. Two of the quantities have been filled in, current and time. What quantity goes in the numerator of the fraction?

In this question, we are given a mathematical expression for current with one of the quantities missing. We’re asked to fill in the blank. Recall that current is a flow of charge in an electrical circuit. Current is measured in units of amperes and is a measure of the amount of charge that passes a point in the circuit every second. We can calculate the current in a circuit by dividing the amount of charge that passes a point by how much time the charge was measured for.

Our incomplete expression tells us that current is equal to some quantity divided by time. From the definition of current, we know that the quantity of charge should go in the numerator. So the correct answer to this question is “charge.”

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