P2 - Current and Circuit Symbols

What is current?

A flow of electrical charge.

What is the unit for current?

Amperes, A

What is potential difference?

Driving force that pushes charge around.

What is the unit for potential difference?

Volts, V

What is resistance?

Anything that slows down the flow of charge.

What is resistance measured in?

Ohms, Ω

What is the relationship between resistance, current and potential difference?

The greater the resistance, the smaller the current that flows for a given potential difference.

What is the equation linking charge, current and time?

$$Q=I\cdot t$$

How are wires represented in circuit diagrams?

Straight lines.

You should know the symbols for circuit diagrams.

OK