3T circuits 5.1

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 3

What's in the chapter?

§5.1 - Charge and voltage

§5.2 - Resistance

§5.3 - Connecting resistors

§5.4 - Automatic circuits

What about today?

1. Quick explanation about charge

2. Presentations with explanations

3. What is electrical current?

4. Time to work on exercises / questions about homework

Learning objectives

• You can explain what electrical charge is and use this to explain phenomena caused by electrical charge.
• You can explain the relation between charge and current. 

What do you know about 'charge'?

The definition

But what does it do?

How can we make it visible?

1. Van de Graaff generator - plates

2. Van de Graaff generator - hair

3. Balloon sticking

4. Wimhurst machine

5. Water bending

6. Coin rolling

Discharging

Discharging

How do we call this flow of electrons?

Charge & Current

Charge & Current

I=​t​​Q​​

Atoms & elementary charge

Electrons have a .... charge

1. negative
2. positive
3. neutral

Objects repel each other if ...

1. their charges are like
2. their charges are opposite

To create a positive charge ..

1. You need to add protons
2. You need to remove protons
3. You need to add electrons
4. You need to remove electrons

Across the bottom of a thundercloud and the earth is a large voltage.
Explain why the earth becomes positively charged.

Work on the exercises