mixed circuits

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

mixed circuits

on your table:

-laptop (closed)

lesson objectives

repeat series and parallel

repeat drawing circuits

calculating mixed circuits

startup	5min
repeat series	5 min
repeat parallel	5 min
mixed circuits	10 min
practice building and measuring circuits	20 min

prior knowledge

Has an electrical appliance ever broken down at home? What happened to other appliances?

are they then connected in series or in parallel?

series

parallel

series

What happens if one light bulb in a series circuit breaks?

series

Draw two light bulbs connected in series to a battery.

The current (I) is the same everywhere.

The voltage (U) is distributed.

If one device fails, everything fails.

Applications: Christmas lights, batteries in toys.

series circuit

I3 = .... A

2

0

3

4

5

6

series circuit

U1 = .... V

U2 = .... V

1

0

2

3

4

5

parallel

What happens if one light bulb in a parallel

circuit breaks?

parallel

The voltage (U) is the same everywhere.

The current (I) is distributed evenly.

If one device breaks, the other will continue to work.

Applications: classroom lamps, electrical outlets.

9

9

3

3

7

3

30

12

7

5

mixed circuit

Bulb 1 burns brightest.

If you unscrew bulb 1, everything goes out.

If you unscrew bulbs 2 or 3, only that bulb goes out.

mixed circuit

What will happen if light 1, 2, or 3 breaks?

which light goes out if
you unscrew bulb 2

1. 1
2. 3
3. 4

4

4,3

2

5,3

5,2

3,3

4,2

practice

Now build your own mixed circuits, first calculate them, then measure them.

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