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# Flow of Charge

### Flow of Charge

The electric current (I) is the amount of charge (Q) passing past a point in a certain amount of time (t). I = Q ÷ t

**True** or **false**? A charged particle is unable to move.

**True** or **false**? Electric current is the flow of electrons.

Particles with a **similar** **charge** are repelled away from each other, whilst particles with **opposite** **charges** are attracted to each other. The **electric** **current** is the rate of flow of this charge (electrons) past a fixed point.

Have a look at this image.

It shows the flow of charge past a fixed point A.

What letter is used to represent the charge?

Which of the following is electric current measured in?

If we are trying to work out the **rate** of flow of charge, what other information do we need apart from the charge?

The electric current is the amount of charge passing past a point in a certain amount of time. If a charge of 1350 coulombs passes through in 30 seconds, what is the charge per second?

If $Q$ is the amount of charge in **coulombs**, $I$ is the current in **amps**, and $t$ is the time in **seconds**, then which one is the correct formula for calculating current?

Which of the following is the unit for amount of charge?

The amount of charge that passes a point in the circuit is measured in **coulombs (C)**. We measure the current in **amps (A)**. Time is measured in **seconds (s)**.

What is the **charge**, if a current of 5 amps flows through a circuit for 20 seconds?

What is the **charge** if a current of 2 amps flows through a circuit for 2 minutes?