An Investigation Into The Resistance Of Conductive Putty
Primary Work
In this experiment I will be using conductive putty for the first
time. I do have knowledge of electrical circuits such as parallel and
series. I have knowledge of electrical equipment like bulbs, battery
cells and variable resistors. And I have knowledge of the circuits'
advantages and disadvantages. My plan is to use the putty in a series
circuit with an ammeter and record the currant.
Prediction
==========
I believe that the shorter the piece of putty the stronger the currant
will be. I believe this because I have found that electrons always
take the shortest route.
Apparatus
In this experiment I will need; a light bulb, a light bulb holder, a
battery pack, four crocodile clips, an ammeter, a power supply, a
piece of putty and four wires. I will need the light bulb to show if
the circuit is complete. The battery pack is control the electrical
currant and the crocodile clip and wire to carry the currant.
Safety
The first danger is the power of the electrical currant. To prevent
any danger of electrical shocks I will use the battery pack to control
the strength of the currant and turn it down to four cells. The power
will be DC (direct currant) and the putty used will be on a
non-conductive surface.
What factors could affect what happens
There are two obvious factors what come to mind and that is inaccurate
measuring and uneven amount of putty. I will have to be careful with
the measuring of the putty and the amount removed each time.
What I am going to change
In the experiment I am going to keep the putty's diameter the same but
change the length each time and record the amps with each reduction in
the putty.
What I will measure in
I plan to measure the putties length and diameter in centimetres and
the currant in amps.
What factors I am going to keep the same
Now that you have an idea on the parts and tools needed for the conversion, it's time to...
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Being poor, Morse used materials like an old artist's canvas stretcher to hold his invention, a home-made battery and an old clock-work to move the paper on which dots and dashes were to be recorded. In 1837 Morse got two partners to help him develop his telegraph. One was Leonard Gale, a quiet professor of science at New York University, who taught him how to increase voltage by increasing the number of turns around the electromagnet. The other was Alfred Vail, a young man who made available both his mechanical skills and his family's New Jersey iron works to help make a better telegraph model.... ... middle of paper ...
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