Investigating The Resistance of Nichrome

Investigating The Resistance of Nichrome

We used different pieces of wire that were also of different material

that were roughly the same length and we tested the resistance of the

different material wires. We recorded results of resistance for 2

different lengths which were 10cm and 20cm we did the experiment twice

for each piece of wire.

Preliminary Results:

Length

Copper

Iron

Constantan

Nichrome

10cm (1)

0.3

0.5

1.1

2.3

10cm (2)

0.4

0.4

1.0

2.1

20cm (1)

0.4

1.1

1.8

3.9

20cm (2)

0.4

0.7

1.9

4.0

Preliminary Conclusion:

We have decided to use Nichrome because it has a high resistance and

varies in resistance depending on how long the piece of Nichrome wire

is; currently we have only experimented with lengths of 10cm and 20cm.

Main Experiment Work: -

Aim:

To discover at what lengths of wire does resistance occur and how much

resistance occurs at what lengths. Also to explain what resistance is

and the factors that affect it and how it is calculated.

Method:

Using the 2 clips place them on the wire with reasonable lengths

between them, lengths that we had planned before the experiment, we

then repeated the results for each length, we read the resistances,

current and potential difference from the equipment we use then take

down the results. Once we have recorded all the results we then

calculated the averages of the resistance between the two results of

each length.

Equipment:

AC/DC Power Adapter

5 Standard Wires

2 Croc Clips

Voltmeter

Ammeter

65cm Length of Nichrome Wire

What We Did:

We used a piece of Nichrome wire and we measured resistance based on

the different lengths at which we placed clips on the wire, we