4.1 Making an electrical circuit

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 2

4.1 Making an electrical circuit

Which of the following is a good conductor of electricity?

1. Copper
2. Wood
3. Rubber
4. Glass

Copper

Copper is a metal.

Metals are conductors.

Which material is an insulator?

1. Brass
2. Aluminum
3. Iron
4. Plastic

Plastic

Electrical wires are wrapped by plastic so you don't get shocked. 

The inside is made of copper

Build your own circuit

Open circuit

Closed circuit

Measuring electrical current

The unit of the electrical current is ampère (A)

Prefixes: milli, kilo, etc

The unit for current is ampère, but often we talk about mA (milliampere). 

Let's see in the next couple of questions if you can still convert the prefixes. 

What is 5 kilograms in grams?

1. 50 grams
2. 50000 grams
3. 5000 grams
4. 500 grams

What is 2 milliliters in liters?

1. 0.02 liters
2. 0.002 liters
3. 0.2 liters
4. 2 liters

What is 3000 millimeters in decimeters?

1. 30 dm
2. 300 dm
3. 0.3 dm
4. 3 dm

What is 200 mA in A?

1. 20 A
2. 0,02 A
3. 2000 A
4. 0,2 A

Let's check

What is the purpose of a closed circuit?

1. To generate static electricity
2. To allow the flow of electric current
3. To block the flow of electric current
4. To store electrical energy

What is the unit of electrical current?

1. Ohm (Ω)
2. Watt (W)
3. Volt (V)
4. Ampère (A)

Why are electrical wires wrapped in plastic?

1. To prevent electric shock
2. To increase conductivity
3. To reduce resistance
4. To enhance insulation