Current Equals Charge Over Time

I t dq t dt.

Current equals charge over time. Unfortunately 2 over 2 minus 1. I t is the momentary current i at time t in amps a. The amount of charge is the current times the time so after 5hours at 2 amps it has taken a charge of 10 amp hours. The questions on this page test your ability to use the formula.

Electrical current is measured by the rate of electric charge flow in an electrical circuit. How much charge has moved. Electrical current is the amount of charge that passes across that cross section per unit of time. Charge current time.

A current of 2 a flows for 30 seconds through a lamp. T is the time in seconds s. You should also learn the formula in the internationally agreed characters. As depicted in the diagram below the current in a circuit can be determined if the quantity of charge q passing through a cross section of a wire in a time t can be.

Q t is the momentary electric charge in coulombs c. Current is not related to the charge in an infinitesimally thin cross section of a wire. If the current is constant the last expression you show works. I displaystyle frac q t if the current varies your first expression is appropriate.

Yet current is a physical quantity that can be measured and expressed numerically.