2 YR2_T2_LSN7 2.4 Circuits

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

YR2_T2_LSN7

Topic 2.4 Circuits

Get ready

• Get your MacBook
• Go to LessonUp
• Join this lesson

Planning for today

• Repeat 2.3
• Topic 2.4 Circuits
• Bean Project

Voltage

 Voltage (U) is how much electrical energy each electron is carrying. 

 

Measured in Volts (V) with a voltmeter

Current

A current (I) is how many electrons flow past every second.

 

Measured in Amps (A) with an "ammeter" (amperemeter)

Which of the following is an energy source

1. chemical energy
2. Battery
3. Solar energy
4. Sound energy

Kinetic energy

Thermal energy

Chemical energy

Electric energy

Nuclear energy

Sonic energy

Energy that results from movement of an object

Energy resulting from a temperature difference between two systems

Energy resulting from reactions between atoms and / or molecules

Energy resulting from the flow of electrons

Energy resulting from changes in the atomic nuclei or from nuclear reactions

Energy in the form of sound waves

Energy

Power

Time

Voltage

current

I

P

U

E

t

What is the unit for electrical current?

1. V for Voltage
2. A for amps
3. W for Watts
4. v for Speed

What is the value
of this voltmeter?

1. 2,5 volt
2. 25 volt
3. 12,5 volt
4. 0 volt

What is an insulator?

1. A material that does not conduct electricity
2. A material that conducts electricity
3. A clamp to connect two electric wires
4. An electric source

Learning goals 2.4

I can…

• explain the basic components necessary for building a simple circuit
• draw circuit diagrams by using the circuit symbols
• explain the advantages and disadvantages fo a parallel circuit

2.4 Circuits

2.4 Circuits

2.4 Circuits - series

2.4 Circuits - Series

• All components are in the same loop, end to end.
• There is only one way the current can flow
• Same current throughout the entire circuit
• Voltage is shared by all components in the circuiekst

Every am-meter will show the same value

The voltage is shared by all components

2.4 Circuits - Parallel

2.4 Circuits - Parallel

• Multiple loops or paths for the current to flow through
• Currents is divided through every pathway
• Voltage is the same for all components

-Voltage same for all components

-Current is divided

-Current only divides equally if components are the same

Place the correct symbol behind the electrical components

Battery

Wire

Switch

Light bulb

LED

Mains socket

What happens to the voltage when there are more components in a series circuit?

1. every component gets the same voltage
2. one component gets all of the voltage
3. The voltage is shared by all components
4. this won't work

voltage is the same for all components

current is the same throughout circuit

Series

Parallel

Still works if one lamp is broken

If you connect batteries this way, you can add their voltages

Assignment last week 

Make the following circuits work in the app: "Inleiding"

• let a lightbulb burn with a battery
• let a lightbulb burn with a battery and a switch
• let 2 lightbulbs burn with a battery and a switch

Assignment this week 

See Classroom: Sim activity: conductor or insulator?

Assignment this week 

See Classroom: Sim activity: conductor or insulator?

Homework

• Read Topic 2.4 
• Make the exercise 36-40 of Topic 2.4 
• Study the glossary of Topic 2.4 on StudyGo.