Factors that Affect the Amount of Voltage in a Wire

413 Words1 Page

Factors that Affect the Amount of Voltage in a Wire

We are going to find out what factors affect the ammount of voltage in

a wire.

Theory

As soon as we turn on the power pack electrons are being forced

through the wire. If we increase the voltage on the power pack this

generates more heat in the wires but this can not be controlled. If

the resistance wire is long it will take longer for the electrons to

pass through. Just like if you were trying to run round a running

track and sombody was holding you back. It would take longer for you

to do one lap if the coarse was very long. If the coarse was not very

long you would do it in a much faster time.

Therefor the longer the resistance wire the higher the resistance.

Apparatus

· 1 Power Pack

· 1 Volt Meter

· 2 Crocodile Clips

· 6 Insoluated wires

· A piece of resistance wire 50 cantermeters in length

· 1 Ammeter

Plan

The first thing to do is to collect all the pieces of apparatus on the

list and setup the experament as shown. Turn on the power pack and set

it to 2

volts. Look at the reading on the voltmeter and ammeter then write

them down. Turn off the power pack and wait for a few seconds . Do

this 3 times this will allow us to calculate a average. Then reduce

the crocodile clips on the resistance wire by 10 centermeters and turn

on the power pack again. Look at the readings on the volt meter and

ammeter and repeat this step again. Carry on doing it untill the

amount of resistance wire reaches 10 centermeters.

[IMAGE]

his diagram shows how i will setup the equipment

Prediction

As we change the length of the resistance wire the amount of current

flowing through the wire the will decrease. I expect the reading of a

longer piece of wire to have a lower

Open Document