2-8 Current and voltage (2.3)

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

Current and voltage

(p. 80)

What you need:

- Textbook, writingbook, iPad

- Pen, pencil, geotriangle

- Calculator

Schoolbags in the cuboard

Phones in the phonebag

Bluetooth 

- ON

- VPN off

    Lesson today:

- Lesson goals (5 min)

- Content (10 min)

- Working by yourself 

    (15 min)

- Corrections (5 min)

- PHET simulation (10 min)

- Conclusion (5 min)

                       Lesson goals:

- Explain what happens with current 

    in a parallel and in a series circuit.

- Explain what happens with the voltage in a parallel and in a series circuit.

Magnitude of current

The magnitude of the current is the ammount of electrons that pass through a wire at a given point per second.

A power source is like a pump.

multiple plug socket

• Parallel connection
  
• Voltage is the same in each branch. 
  
• Current in the branches must be added to get the total current.
  

Series circuit

- Current is the same 

   everywhere

- The voltage divides over 

   the components

Parallel circuit

- Current divides over the

   branches

- The voltage is the same 

    in each branch

The current is measured in volt.

1. True
2. False

All appliances in a house are connected in parallel.

1. True
2. False

If a greater current passes through a lightbulb, the light will be brighter.

1. True
2. False

The more appliances you connect to a multiple plug socket, the greater the current will be.

1. True
2. False

One milliamp equals one thousand amps.

1. True
2. False

In a parallel circuit every appliance is connected directly to the positive and negative terminals of the power supply.

1. True
2. False

If the batteries are alkaline batteries, what is the total voltage?

1. 1,5 V
2. 3 V
3. 4,5 V
4. 6 V

If the total voltage over the batteries is 9V, and the voltage across R1 = 2,5V, and over the parallel connection is 4V, what is the voltage over R2?

1. 1,5 V
2. 2,5 V
3. 2,0 V
4. 5,0 V

If the current through R1 is 7 A, and R3 and R4 are identical resistances, what will the current through R3 be?

1. 3,5 A
2. 7 A
3. 14 A
4. 2,3 A

Now do  50 up to 56 (p. 81)

WHEN YOU ARE DONE: Play with the PHET simulation on the folowing page 

RULES:

• Write in your writingbook
  



• Use: Your textbook
• No discussion
  


• In 15 minutes we will discuss the answers
  

https:

Conclusion

Series circuit

Voltage splits

Parallel circuit

Voltage is the same