Next, we do a new activity problem on the PhET website on the Circuit Construction Kit (DC only version)
Finley tells us "to create a circuit with three or more lightbulbs to come up with a few different setups." and then to "draw the setups"
The following pictures shows an example of one setup that works.
As we add more and more lightbulbs to the circuit, they begin to diminish in glow. That is because the battery has to split the power between all the light bulbs.
The blue dots that are moving in the wires and the battery are electrons.
What we learned today is very important for scientists to know. It is the fundamentals of electrical science. It also applies to daily life a lot.
When an engineer is building something he is going to use batteries in, he needs to know how much power the battery will send out, so then he can correctly calculate the electrical current.
Also, Mr. Finley used an example of electrons to tell us that we encountered it before. When we get shocked by something, that is also called the transfer of electrons.
YZ
When I did this experiment I noticed that when I had 2 batteries that faced opposite directions the light bulb didn't light. That was straight forward enough the negatives and the positives were not facing the same direction so I assumed that was the problem. Next when I did the same thing with 3 batteries, one facing one way and the other 2 facing the other, the light bulbs lit up dimly. It turns out that each battery sends out +1 energy. When two light bulbs are going different directions one does +1 energy and the other does -1 energy. This makes 0 energy which does not light the bulb. When there was 3 the equation was 1+1-1=1 so the system had some energy. I tested this by only using one light bulb and seeing if it made the light bulb shine the same brightness and I was correct.
ReplyDeleteYS
Whoops I meant
ReplyDeleteI tested this with one BATTERY it made..........
When Mr Finley was talking about the balloon rubbing on the head, I was kind of confused. How come when the balloon attracted the hair, why did the hair spread apart?
ReplyDeleteKS
i like your blog. it is very detailed and explained well. but what exactly is an electron?
ReplyDeletejc
I sort of get electrons, but what actually is an electron?
ReplyDelete-EP
Your pictures of the circuit were really helpful in understanding how t properly build one! Good job!
ReplyDeleteKV
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ReplyDeleteHey great post. Just wondering if you know how to calculate how much power is in the battery because we didn't go over that in class and im really curious to know how you would calculate that.
ReplyDeleteKM
Power is energy / time or work/time ... in other words, the amount of energy per second.
ReplyDelete