Experiment 1
When you click this link you’ll get an Internet site. That
site will give you the possibility to make “virtual” electric
circuits easily.
• Make the circuits you have just seen and measure the voltage
and the current.
The numbers you find here are not the right numbers. The battery
in the pictures gives 9 volt and the battery in the “virtual” electric
circuit gives 10 volt. But still you can see what numbers the “virtual” circuit
are: higher, lower or the same.
•
Explain why the numbers you’ve filled in at voltage and
current have to be higher, lower or the same.
Experiment 2
Materials:
• A battery of 9 volt
• Three light bulbs
• Six electric wires
• Multimeter or voltmeter and ammeter
Make the same circuits, but now for real. Perhaps you have seen
that the voltmeter must be connected in series and the ammeter
parallel. When you don’t know what is meant here, look
at the “virtual” circuit
and see how the voltmeter and the ammeter are connected.
•
Measure the voltage and current with the multimeter on the numbered
places and darts.
•
Fill in the numbers in the table.
•
Do you will be able to make a formula to measure the voltage
and current? Explain.
•
Connect the light bulbs or resistances not in series but parallel.
Do you get entire different numbers? Explain.
