PS Unit 7 L4.1 - Explaining Electric Current

Front

What is Electric Current?

Back

Electric Current is the continuous flow of electric charges from one region to another.

Front

What device measures electric current?

Back

An ammeter is used to measure the rate at which electric charges move through a wire.

Front

Why is measuring electric current important?

Back

It is important to ensure the circuit is safe and functioning correctly.

Front

What happens to the number of charges if the current is halved?

Back

The number of charges passing a point per second is also halved.

Front

What is the unit of electric current?

Back

The unit of electric current is the ampere (A).

Front

What is the relationship between voltage and electric current?

Back

Voltage is the force that pushes electric charges through a circuit, while electric current is the flow of those charges.

Front

What is resistance in an electrical circuit?

Back

Resistance is the opposition to the flow of electric current, measured in ohms.

Front

How does increasing resistance affect electric current?

Back

Increasing resistance decreases the electric current in a circuit, assuming voltage remains constant.

Front

What is a circuit?

Back

A circuit is a closed loop that allows electric current to flow.

Front

What is the role of a voltmeter?

Back

A voltmeter measures the voltage across two points in a circuit.