Varying the Voltage Across a Fixed Value Resistor
For my project I am going to investigate the affects that occur when
varying the voltage across a fixed value resistor. I will observe
things that will happen. I will look at a variety of possibilities,
and hopefully I will find out what happens when the voltage is
changed.
Planning
========
Things the voltage may effect when varied are:
Current
Heat
Resistance
I have decided to change the voltage and measure the current.
Prediction
==========
I predict that if I double the voltage, then the current will also
double. I predict that the voltage will be proportional to current.
The current is the flow of electrons. You can compare a wire to a
water pipe. The flow of electrons is like the flow of water. The
voltage is the push of electrons, which in equivalent would be the
pressure of the water in the pipe.
Therefore if you double the voltage, I think the current will also
double. This is similar to doubling the pressure in the water pipe,
which in affect, will double the flow of the water.
The reason I will test my theory is so I can see if ohm's law was
correct by saying,
"Voltage is proportional to current."
This is one of the main reasons that I think doubling the voltage will
cause the current to double. Resistance is the force that acts against
current.
Fair Test
To make my experiment fair I must do the following:
♥ Turn off the power supply when not in use to prevent over heating.
If this occurs the resistance will increase which would make the
results unfair and unreliable.
♥ Use the exact same equipment if possible throughout the experiment
♥ Use a fixed value resistor to keep the resistance the same/
constant.
Safety
======
There are safety regulations that must be followed in order to keep
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...ia Britannica. 2014. law of octaves (chemistry) -- Encyclopedia Britannica. [ONLINE] Available at:http://www.britannica.com/EBchecked/topic/424834/law-of-octaves. [Accessed 14 May 2014].
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