how length of a piece

of wire affects the resistance

Plan

Equipment

• Power pack
• Ammeter
• Volt meter
• Nichrome wire
• Crocodile clips
• Leads

I am going to find out how the length of a piece of Nichrome wire affects the amount of resistance by measuring the voltage (V) and current (I) using this set up and by reducing the length of the Nichrome wire by 30cm each time.

Key

Power pack =

Ammeter =

Volt meter =

Nichrome wire =

When I have my readings I will work out the resistance using the formula- Resistance = Voltage

Current

Independent Variables

• Temperature
• Width
• Material
• Length

Temperature-

The higher the temperature the further and faster the atoms oscillate so there is more chance of the electrons colliding with them.

I will control this by turning of the power pack and leaving it for 30 seconds to...