4.1 Making an electrical circuit

• physics
• Middelbare school
• havo, vwo
• Leerjaar 2

4.1

Making

an 

electrical

circuit

Electricity?

You need a closed circuit to let an electronic device work

Electrical circuit

• a voltage source (supplies electrical energy)
• connections (carries electrical energy)
• device(s) (consume electrical energy)

Conductors

Substances that electrical currents can flow through easily

Insulators

Substances that do not allow electrical current to pass through them (or only very poorly)

Insulator

Conductor

Measuring current

What is current?

= an electrical currents consists of moving charge

Current (I)

is a variable (something we can measure) and is measured in Ampere (A).

E.g. I = 1,5 A

Converting Amps

1 A = 1000 mA

1 mA = 0.001 A

Skills 8 (page 179)