Monday, Oct 20th, 2008

Hmm...... My first blog and I don't remember much lol

orz... I have no idea where to start but I'll give it a shot

So, the first question(?) we did in class was the empty cageish(?)

barrel that was electrically charged and aluminum foil was

hung inside the cage, and out side of the cage.

Our task was to guess how these foils reacted when the cage

became charged.

The inner ones did not get affected because the electric field

inside a conducting substance cancels out, and only the outside

ones flipped towards the outside. ( I aint rly sure if this is useful)

The second part(!) was ...... rolling balls down the nailed board(?)

The factors that affected the time the balls took to fall out was

1. The Cross sectional Area ( same as a wire, R = inversily proportional)

2. The Length of the run ( same as a wire, R = directly proportional to length)

3. The Density of the nails ( for sitting, the denser the better, but...... for

- the balls, less denser -> faster time )

The 3rd part was the...... relativity of parallel structure, series structure

of the batteries, and the light bulbs.

When light bulbs were set in a parellel structure, every lightbulb lit up

with the same brightness of a single bulb.

But when the light bulbs were set in a series structure, the brightness

decreased as more bulbs were added to the circuit.

When the batteries were set in a parallel structure, the voltage

equaled to a single battery, but the lifttime of the battery increased.

V = v1 + v2 + v3 ................for series structure

V = v1 = v2 = v3................ for parallel structure

R = r1 + r2 + r3................. for series structure

1/R = 1/r1 + 1/r2 + 1/r3 ..... for parallel structure

AND V = IR -> OHM's Law(?)

V -> voltage
I -> current
R -> resistance

Basically thats all I remember... for more detail,

go ask the professor maybe?