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To investigate the relationship between current and potential difference (ohm’s law).

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  • Essay length: 424 words
  • Submitted: 11/07/2002
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AS and A Level Electrical & Thermal Physics

The first 200 words of this essay...

Ohm' Law

Aim: To investigate the relationship between current and potential difference (ohm's law).

Prediction: I predict that as the current increase or decrease the voltage will increase or decrease in the same proportion.

Safety: This is not a very dangerous experiment, never the less, we should take care when handling electricity and make sure that our hands are dry.

Apparatus:

- Power supple.

- Variable resistor

- Resistor

- Volt meter

- Ammeter

- Wires

Procedure:

As written in experimental handout attached.

Results:

Current (A)

Voltage (V)

Resistance (?)

0.29

5.52

19.03

0.26

4.91

18.88

0.24

4.48

18.66

0.21

3.91

18.61

0.19

3.78

19.89

0.18

3.45

19.16

Discussion:

As you can see from my table of results, the current decreases along with the voltage. When the current was 0.29 amps, the voltage was 5.52 V. When the current was 0.26 the voltage was 4.91 V . When the resistance decreased again, the current

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