Electric Current Physics Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

easy
How long does it take for 15 C15 \text{ C} of charge to flow through a circuit with a current of 3 A3 \text{ A}?

Solution

  1. 1
    Rearrange Q=ItQ = It for time.
  2. 2
    t=QI=153=5 st = \frac{Q}{I} = \frac{15}{3} = 5 \text{ s}

Answer

t=5 st = 5 \text{ s}
Current, charge, and time are related by I=Q/tI = Q/t. Knowing any two quantities allows calculation of the third.

About Electric Current

Electric current is the rate at which electric charge flows past a point in a circuit or conductor.

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More Electric Current Examples

Example 1 easy

A charge of [formula] flows through a wire in [formula]. What is the electric current?

Example 2 medium

A current of [formula] flows through a lamp for [formula]. How much charge passes through the lamp?

Example 4 medium

A phone charger delivers a steady current of [formula] for [formula]. How much total electric charge

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