Physics Resistance Of A Wire Flashcards
What is the aim?
To investigate the relationship between the length of a wire and its resistance
Why are wires not perfect conductors of electricity
Because they have some resistance
What will you do in this practical
Investigate how a wires resistance varies with length by measuring the current flowing through the wire and the potential difference across it
Independent variable
Length of wire
Dependent variable
Resistance of wire
Control variable
Thickness of the wire, material of the wire, temperature of the wire
Which of the following is connected in parallel with the wire being measured?
Voltmeter
What is the independent variable of this experiment
Length of wire
What is the purpose in plotting a graph of resistance against length
To work out the relationship between length and resistance
What would be a valid conclusion for this experiment
As the length of the wire increases, the resistance of the wire increases linearly
What would not improve the accuracy of the data
Ensuring the current continues to flow between readings
