## 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.

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# all-equations

# all-equations

## Charge

## Resistance

## Resistance in Series and Parallel

## Electrical Power

## Density

## Specific Latent Heat

## Half Life

## Gravitational Potential Energy

## Efficiency

## Energy Transformed

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

**Resistance** is an electrical quantity that measures how a device or material reduces the electrical **current** flow through it.

Resistors in series and in parallel can change the total **resistance** in a circuit.

The **power **of an appliance is the **energy** that is transferred per **second**. Electric **power** is the rate, per unit time at which electrical **energy** is transferred by an electric circuit.

**Density** is a measure of how compact the particles are in a substance. **Density** is defined as the mass per unit volume.

**Specific latent heat** is the **energy **needed to change the state of a substance.

The radioactivity of a sample decreases over time. **Half life** is a measurement of this decrease.

Lifting an object in a gravitational field transfers energy into the objects gravitational energy store. **Gravitational potential energy** is the **energy** an object has due to its height above Earth.

The **efficiency** of a device is the proportion of input **energy** that is converted to **useful energy**.

The **potential difference** between two points is the **energy transferred** per unit **charge**. An electrical circuit is an energy transformation device.