How Does The Length Of Wire Affect Its Resistance
Physics GCSE coursework: Resistance of wire
Aim: To investigate if the length of wire affects its resistance.
Prediction (Hypothesis):
I predict that the longer the wire the higher the resistance, and the shorter the wire the lower the resistance.
Knowledge:
Resistance is that property of electric components that turn electric energy into heat in opposing the passing of an electric current.It can be beneficial, as in electric heaters, or a pest, as in light bulbs, where the heat is produced alongside the light – we want maximum light and minimum heat. Reistance is often unwanted and we try to minimise it since it results in lost energy, which costs money. Lately superconducters have bee in the news a lot. The are very special …show more content…
Keep the thickness the same.
Equipment List:
• Metre Ruler • Power Supply • Ammeter • 1 metre length of wire • Wires for power supply and ammeter. • Contacts
Safety:
Ensure no live high voltage wires are exposed; this is done by having a small voltage of 2V. Wear safety goggles to protect eyes from the power supply. Work in pairs to prevent any dangerous incidents occurring. Make sure that all taps are turned off to prevent possible electrocution. Be quiet, talk sensibly, do not shout and always listen to your teacher.
Method and Diagram:
Step 1: I put on my safety goggles. Step 2: I set up my apparatus. Step 3: I switched on power supply to 2V. Step 4: Fixed wires to power supply and metre ruler with the wire. Step 5: Attach second wire to the ammeter. Step 6: Leave a ‘loose’ wire from the ammeter so that you can record your results. Step 7: Move the ‘loose wire along the metre stick with the wire at different lengths (20cm, 40cm, 60cm, 80cm, and 1m) and record results from the ammeter. Step 8: Repeat Step 7 three times and create an average. Step 9: Divide the voltage (2V) by the average results (in Step 8) to find the
Aim: To investigate if the length of wire affects its resistance.
Prediction (Hypothesis):
I predict that the longer the wire the higher the resistance, and the shorter the wire the lower the resistance.
Knowledge:
Resistance is that property of electric components that turn electric energy into heat in opposing the passing of an electric current.It can be beneficial, as in electric heaters, or a pest, as in light bulbs, where the heat is produced alongside the light – we want maximum light and minimum heat. Reistance is often unwanted and we try to minimise it since it results in lost energy, which costs money. Lately superconducters have bee in the news a lot. The are very special …show more content…
Keep the thickness the same.
Equipment List:
• Metre Ruler • Power Supply • Ammeter • 1 metre length of wire • Wires for power supply and ammeter. • Contacts
Safety:
Ensure no live high voltage wires are exposed; this is done by having a small voltage of 2V. Wear safety goggles to protect eyes from the power supply. Work in pairs to prevent any dangerous incidents occurring. Make sure that all taps are turned off to prevent possible electrocution. Be quiet, talk sensibly, do not shout and always listen to your teacher.
Method and Diagram:
Step 1: I put on my safety goggles. Step 2: I set up my apparatus. Step 3: I switched on power supply to 2V. Step 4: Fixed wires to power supply and metre ruler with the wire. Step 5: Attach second wire to the ammeter. Step 6: Leave a ‘loose’ wire from the ammeter so that you can record your results. Step 7: Move the ‘loose wire along the metre stick with the wire at different lengths (20cm, 40cm, 60cm, 80cm, and 1m) and record results from the ammeter. Step 8: Repeat Step 7 three times and create an average. Step 9: Divide the voltage (2V) by the average results (in Step 8) to find the