# Electric Circuits Investigation 2

Electronics - Devices

Oct 7, 2013 (4 years and 9 months ago)

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2
2

Go to
http://phet.colorado.edu/simulations/
index.php?cat=Electricity_Magnets_and_Circuits

Click on
Circuit Construction Kit (AC+DC)

1)
First make a simple circuit shown in diagram 1.

Diag
ram 1

2)
What do you think will happen to the brightness of the light bulbs if you added another one in series?
Write down your prediction.

3)
Connect the circuit shown in Diagram 2. This circuit has one battery like the first simple circuit bu
t
two light bulbs.

Diagram 2

4)
What do you see happen to the brightness of the bulbs?

What do you see happen to the speed of the electrons in the wire?

5)
What do you think will happen to the brightness if you connected three b
ulbs in series?

6)
Connect a circuit with three bulbs in series, shown in Diagram 3.

Diagram
3

7)
What happens to the brightness of the bulbs?

What happens to the current?

8)
What do you think will happen to the brightness

of the light bulb if you add another battery in series
so it looks like Diagram
4
.

Diagram
4

9)
Connect the ci
rcuit and write you observation for the brightness and current

10) If you were to add five batteries
…what would you thin
k would happen to the brightness of the bulb

and to the current
?

Connect and observe.

11)
Connect another light bulb in parallel as shown in diagram
5
.

Diagram
5

12)
What do you think will happen to the brightness of the bulb
s?

What do you think will happen to the current?

13)
Connect the circuit and write down your observation.

Connect the circuit
with no light bulb and
write down your observations.

What is this circuit called?

Design your own circu
it that includes both series and parallel lightbulbs. Draw the diagram below.

Play and have fun with the sims!!!!!!!!