Lesson 2 — Circuits

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

Class layout – Science

Class layout – Science

Class layout – Science

Chapter 9 Electricity

Circuits

• Recap quiz
•  Circuits & circuit diagrams
• Electric Current

Recap

Quizz

What is electric charge?

1. A form of energy
2. A property of matter

What are the two types of electric charge?

1. Up and down
2. Blue and red
3. Hot and cold
4. Positive and negative

What is the interaction between the two types of electric charge?

1. Same charges: attract Opposite charges: repel
2. Same charges: repel Opposite charges: attract

Electric charge

What particles cause negative electric charge?

1. Protons
2. Neutrons
3. Electrons
4. Ions

What particles cause positive electric charge?

1. Protons
2. Neutrons
3. Electrons
4. Ions

An object gains negative charge by gaining electrons

1. True
2. False

An object gains positive charge by loosing electrons

1. True
2. False

Link

What is electricity?

1. A flow of negative charge (electrons) from a positively charged pole to a negatively charged pole.
2. A flow of negative charge (electrons) from a negatively charged pole to a positively charged pole.
3. A flow of positive charge (protons) from a positively charged pole to a negatively charged pole.
4. A flow of positive charge (protons) from a negatively charged pole to a positively charged pole.

Electricity is:

A flow of electrons from a negatively charged pole to a positively charged pole.

A material through which electricity can easily flow is called

1. a conductor
2. an insulator
3. Electric wiring
4. protective material

A material through which electricity does not easily flow is called

1. a conductor
2. an insulator
3. electric wiring
4. protective material

Circuits

circuit drawing

Link

electricity — three core properties

• Current
• voltage
• Resistance

Current

Current

In water: 

• The amount of water that flows by per second
• Expressed in: liters / second

In electricity:

• The amount of electric charge that flows by per second
• Expressed in: coulombs / second (ampere)
• Note: 1 coulomb is 6.24 • 10¹⁸ electrons.

Current

The amount of electric charge that flows by per second.

• Expressed in: Ampere
• 1 ampere is 1 coulomb/ second

1 coulomb stand for 6.24 • 10¹⁸ electrons

Current

The amount of electric charge that flows by per second.

The unit of current is: Ampere (A)

• One ampere is one coulomb / second
• One coulomb is 6.24 • 10¹⁸ electrons.

Ampere can also be expressed in:

milliampere (mA) — 1A = 1000 mA

$$I=\frac{Q}{t}$$

I: current (ampere)
Q: charge (coulombs)

t: time (seconds)

ammeter

ammeter