Measuring Current, Voltage and Resistance in Series and Parallel Circuit

Measuring Current, Voltage and Resistance in Series and Parallel Circuit

Purpose:

to determine patterns and formulas to predict "I", "V" and "R" in series and parallel circuit.



Procedure:

as descibed in BC Science 9 P314-315.




Data & Observation:

Serie

Parallel




Example Calculation:
2.8V=2800mV
V=IR
2800=26(I)
2800/26=I
I=107.7






Questions:

In a short paragraph, explain how current and voltage change in a series circuit.

In the series circuit, the current did not change through out the circuit. Voltage changed depending on the place, the two sides of the batteries had the most potiental difference, the two sides LED light had the second most potiental difference, and the two sides of other light had the least amout of potiental difference.

In a short paragragh, explain how current and voltage change in a parallel circuit.

In a parallel circuit, the potiental difference of two of the light bulbs are the same and the battery has a different potiental difference. Current in a parallel circuit, are different on each one.

What do you notice about resistance in series?

The resisitance in series circuit changes as the voltage changes. As the voltage increse, the resistance will also increase, and as voltage decrese, the resistance will also decrese.

Do you notice an obvious patterns for resistance parallel?

I find that the current of the two light bulbs will add up to the current of the battery, because the current will split in at the two pathway and will rejoin after. Therefore, the current of the two light bulb will add up to the current of the battery.

Conclusion:

In this lad, i learned that the potiental difference of all of the resistors are different in series circuit, and the potiental difference are the same for all of the resistors in a parallel circuit. Also, Current is the same through out the whole series circuit, and it is different through out in a parallel circuit.

Lab 9-1A-April 16

Lab 9-1A p307

Purpose:
To gain an understanding of one flow of elections in a circuit.

Procedure:
As described on p307 of BC Science 9.

Data & Observation:




Questions:
1a) If I was an electron and leaved the negative terminal, there would only be one way to arrive at the positive terminal.
1b) If I was an electron and leaved the negative terminal, I would have to travel through 2 light bulbs.
2) In circuit 1, one of the light bulbs is removed and the other light is off, because the electrons in circuit 1 have one way to go back to the battery.
3a) If I was an electron in circuit 2, there would be 2 ways that I could reach the battery.
3b) In these 2 routes, the electron only needs to pass one light bulb.
4) When one light bulb is removed in circuit 2, the other one is still on, because the electrons have 2 choices on which route to take and two light bulbs takes separate electrons.

Conclusion:

In this lab we confirmed the flow of elections in a circuit by observing light bulb.
In circuit 1, either both light bulb are lit or none of them are lit, because everything is connected and the electrons only have one route to take.
In circuit 2, the two light bulbs are separated, and other light were lit, and they could be lit on their own, because there are two routes that the electrons could take, and the two light bulbs receive different electrons.

Lab-April 16,09

Circuit 1

Circuit 2

Both light bulbs in circuit 2

Fire Alarm

This took a while

The photos are our model

These Videos are really long, the last one is the most important

Electric Stuff

This went no-where

Battery

Ignore Suyin's swearing....

Mar. 23rd-Science

Green Bricks(Footage, NG,)

Green Bricks

Cells

1:Because you can't really see the nulceous and the nuclears Membrane

2:You can see the Spindle Fibre and somewhat see that the Chromosomes are lined up in the equator.

3: You can see the chromosomes spliting

4: Now the Nucleous are seperated

Lab- Nov. 19th

Cu-Nov. 6th 2008

Oxygen Fuels the Fire-Oct 31.

Burning Stuff

Elements

Boiling and Melting Point of Elements 1-86

Conclusion: Down a Family: Melting Point Decrese

Across the Elements Table : Melting Point Decrese

Hydrogen And Fire

If you don't have time, just skip the first 4:30 Minutes

Sodium to Water

The Boy Who Wants To See The Famous Hg_____

The boy who wants to see the famous Hg_____

One day a kid walked on the street of Granville saw a lot of lights that are made out of Ne_______. He walked and walked and he saw the Ford store, but the Hg________s Ar_________. He was very sad, so his parent took him to the Sn_______setown to see Fe________man, but he doesn’t want to. Then they saw a Cu_______ on the sky, but the thieves Ar________. His parents went to a Diamond store, Dad wants Ag_________, but Mom wants Au_____________, they started fighting. The boy was more upset so he started throwing Ni______________s at everyone. Then, he saw a parade outside, with Ni________back Pb________ing it. And Ni_______back is driving a Hg______________. He finally saw a Hg_________________.