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

<span style="color: rgb(255, 255, 255)">Conductor</span>

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)