The size of the **current** is the rate of flow of **charge**. Electrons are negatively charged particles which transfer **energy** through wires as electricity.

## What is Charge?

The size of the **current** is the rate of flow of **charge**. Electrons are negatively charged particles which **transfer energy** through wires as electricity. **Charge** is measured in **coulombs (C)**. Electrons are really small and the effect of one electron would be really difficult to measure, It is easier to measure the effect of a large number of electrons. One Coulomb of charge contains 6 × 10^{18} electrons.

## Charge equation

To calculate **Charge** we use this equation.

$Q = { \mathit I \, \mathit t} $

## Charge demo

In this tutorial you will learn how to calculate the the **charge** flowing in an electrical circuit.

## Chilled practice question

Calculate the **charge** when a current of 16 **A** flows for 2 **minutes**.

## Frozen practice question

How long must a **current** of 26 **A** flow to transfer 936 **KC**.

## Science in context

The size of the **current** is the rate of flow of **charge**.

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