Please help with school science report.
Ohm's Law - Resistance?
Below are the results of an experiment I did at school to determine the resistance of an unknown resistor. The results are all over the place and I am having difficulty explaining what went wrong.
The Resistor's actual resistance was 2.2 ohms, but the results were considerably different. I need to explain the results and if the percentage errors are acceptable, but I am having trouble understanding all of this.
1. Can someone please explain why these results likely occurred (errors in the experiment)?, and;
2. Are there any relationships between the results I should highlight (like the amps dropping as the resistance increases in Trails 3 and 4 where the voltage is constant)?
I am so confused. Please help.
Trial Current (Amps) Voltage (Volts) Resistance Percentage Error:
1 0.74 1.5 2.027 -7.863%
2 0.82 1 1.2195 -44.5681%
3 0.2 0.5 2.5 13.53%
4 0.14 0.5 3.5714 62.336%
Ohm's Law - Resistance?
Below are the results of an experiment I did at school to determine the resistance of an unknown resistor. The results are all over the place and I am having difficulty explaining what went wrong.
The Resistor's actual resistance was 2.2 ohms, but the results were considerably different. I need to explain the results and if the percentage errors are acceptable, but I am having trouble understanding all of this.
1. Can someone please explain why these results likely occurred (errors in the experiment)?, and;
2. Are there any relationships between the results I should highlight (like the amps dropping as the resistance increases in Trails 3 and 4 where the voltage is constant)?
I am so confused. Please help.
Trial Current (Amps) Voltage (Volts) Resistance Percentage Error:
1 0.74 1.5 2.027 -7.863%
2 0.82 1 1.2195 -44.5681%
3 0.2 0.5 2.5 13.53%
4 0.14 0.5 3.5714 62.336%