6.3 - series and parallel

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 3

§6.3 series and parallel

Lesson plan:

1. Recap 6.1 and 6.2
2. Explanation series and parallel circuits
3. Check homework and do exercises 6.3
4. Checkpoint question

§6.3 series and  parallel

At the end of this section you can:

• Name the properties of a series circuit, recognise a series circuit and draw a series circuit as a diagram;
  
• Name the properties of a parallel circuit, recognise a parallel circuit and draw a parallel circuit as a diagram;
  
• Compare and distuinguish series and parallel circuits;
  
• Include voltage and current meters in a correct way in a series or a parallel circuit.
  

Which material is or which materials are a good insulator?

1. Plastic
2. Silver
3. Wood
4. Iron

Voltage is measured in...

1. volts
2. amperes
3. amperage
4. current

An ammeter measures the quantity...

1. voltage
2. amperes
3. conductor
4. electrical current

A light bulb lights up when...

Closed electrical circuit

Where should an ammeter be connected?

1. At the power source
2. In series with the circuit
3. In parallel with the circuit
4. Across a light bulb

connecting ammeter

To voltage source

The puls connection of the ammeter has to be at the side of the plus pole of the battery. 

RIGHT

WRONG

+  -

-  +

connecting a voltmeter

To voltage source

How should a voltmeter be connected?

1. To the power source only.
2. In any random position.
3. In parallel with the component.
4. In series with the component.

Series- and parallel

It is convenient to have all home appliances connected in series.

Yes!

No!

No idea!

Christmas lights

How do you need to connect the lights in order for them not to break all at once when one is broken?

This is a ....

1. series connection
2. parallel connection

This is a ...

1. series connection
2. parallel connection

What connection is used for street lights?

1. series
2. Parallel

Get to work

Check §6.1 / 6.2 --> Teams

Study §6.3 

do 30, 31, (32), 33 u/i 36

deel 1

deel 2

Checkpoint:
A student made an electric circuit shown here to measure the current through two lamps. What is the mistake she made?

§6.3 series and parallel

Lesson plan:

1. Recap series and parallel
2. Practicing with circuits
3. Check homework and finish exercises 6.3
4. Checkpoint question

§6.3 series and  parallel

At the end of this section you can:

• Name the properties of a series circuit, recognise a series circuit and draw a series circuit as a diagram;
  
• Name the properties of a parallel circuit, recognise a parallel circuit and draw a parallel circuit as a diagram;
  
• Compare and distuinguish series and parallel circuits;
  
• Include voltage and current meters in a correct way in a series or a parallel circuit.
  

Batteries in series = ................

Batteries in parallel 

The total voltage is equal to the voltage of one battery. Batteries last longer. 

1,5 V  

Assignment:

Build a circuit with 

2 bulbs and 2 batteries (9V)
which provides...

1. as much light as possible;
2. the least light possible. 

You build digitally via:

https://phet.colorado.edu/sims/html/circuit-construction-kit-dc/latest/circuit-construction-kit-dc_en.html

Do not change the settings of the bulbs / batteries. You can change the brightness through varying with series of parallel connections. 

The more light bulbs in a series connection to a voltage source, the                               the light of the bulbs.

When you connect light bulbs in parallel, the light bulbs keep burning                           .

To make a light bulb burn brighter, you need to connect the batteries                             .

  

...

...

...

brighter

equally bright

weaker

 in series

in parallel

Connection in series:

• All light bulbs in the same electrical circuit.
  
  
• The amperage is equal everywhere.
  
  
• The voltage of the voltage source is divided over the electrical components.
  

Via Phet demonstreren.

Amperage in series

2 A

2 A

2 A

Voltage in series

      U_L1 = 2V             U_L2 = 2V

En in een parallelschakeling?!

Assignment

Build a parallel circuit in phet and discover which of the statements to the right are true.

What 2 statements are correct?

In een parallelschakeling ...

A.  is de stroomsterkte overal even groot.

B.  verdeeld de stroomsterkte zich over
      de lampjes/apparaten.

C.   staat over elk apparaat de spanning
       van de spanningsbron.

D.   verdeeld de spanning zich over de

      lampjes/apparaten.

Parallel connection:

• Every bulb in a separate electrical circuit. 
   
• Voltage equal everywhere; for each component. 
   
• Electrical current splits up. Amperage in all routes equals amperage of the main route. 

Via Phet demonstreren.

Get to work

Check HW §6.3 --> Teams

do 37, 38, 39, (40)

What is a short circuit?

Kortsluiting

Phet