To investigate the relationship between current and potential difference (ohm’s law).
Are you in the right place?
Jump to Physics and see how teachers think you should prepare in:
Extracts from this document...
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. ...read more.
When the current was 0.26 the voltage was 4.91 V . When the resistance decreased again, the current became 0.24 A, the voltage also decreased and became 4.48 V. When the current changed to 0.21 A, the voltage became 3.91 V. When the current decreased to 0.19 amps, the voltage became 3.78 volts. Lastly, when the current became 0.18 amps, the voltage became 3.45 Conclusion: Ohm's Law says that the current flowing (I) ...read more.
If a conductor obeys Ohm's Law, the current will increase in proportion to the voltage. If you double the voltage, the current will also double. If we divide the voltage over the current, we are suppose to get the same number. Evaluation: We should make sure that we turn of the power supply off when we are not taking readings, so that are results are accurate and abbey ohm's law. If the temperature increase, the resistance tend to increase and so we will get a curve not a straight line. To make this experiment more interesting, we could have repeated the experiment more times using more resistors. ...read more.
This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics section.
Found what you're looking for?
- Start learning 29% faster today
- 150,000+ documents available
- Just £6.99 a month
- Join over 1.2 million students every month
- Accelerate your learning by 29%
- Unlimited access from just £6.99 per month