I'm just revising for my Physics AS level coursework tomorrow which I know will be about the "resistance of a wire" experiment, as detailed here:
and I just wanted to ask;
in this experiment what are the control, dependent and the independent variables?
Im pretty sure that the independent one is the length of wire, but im unsure about the rest....
Would appreciate your help.
In this experiment what are the control, dependent and the independent variables? Watch
- Thread Starter
- 02-12-2010 00:09
- 02-12-2010 00:16
Dependent will be the current and voltage (and therefore the resistance).
Controls include things such as keeping the cross-sectional area of the wire the same (basically just use the same wire), temperature (which is mainly controlled by switching the circuit on/off between readings), the voltage supplied and all of the component in the circuit must be kept the same.
- 02-12-2010 11:27
In general, just remember this:
the independent variable is the things that you are changing
dependent variables are the things that change when you change the independent variable
controlled variables are all the other things you could change but are not, and they should not be affected by your changing of the independent variable either
- 02-12-2010 11:53
In the link you provided to this experiment, it tells you that
"The variable marked with a * will be varied, the other input variables will be kept constant. The output variable marked with a † will be measured."
Length of wire. *
Resistance of the wire. †
That should answer your question in conjunction with what the others have said here.