An Investigation to Discover Factors That Can Affect The Resistance of a Wire
Aim
I shall be investigating factors that can affect the resistance of a
wire.
The possible variables I could choose are Length, Thickness, type of
metal, Shape, Temperature and Density of Metal.
I will choose Length because I can choose from a free range of lengths
and can get many different readings, to create a final graph at the
end of my investigation.
I will not choose thickness because the wires only come in set
thicknesses and do not go up in a uniform rate, so I would not have a
free range to choose from.
I will not chose types of metals because I only have 3 types of metal
available to me and could not develop a conclusion as I would not be
able to link the variables.
I will not choose shape as I would only be able to choose two sets of
results, straight and not straight.
I will not choose temperature as it would be very hard to measure the
temperature of a piece of metal and would be hard to keep at a certain
temperature.
I also will not choose density of metal as I do not have a range of
densities available to myself and would not have a choice.
Prediction
I predict that when the length of a wire gets longer, the resistance
will become greater.
I predict this because I know that resistance is when a flow of
electrons, (a current) flows through a wire and collides with the
metal ions that create the wire.
The more times they collide with the metal ions the less energy the
electrons have to go through the wire with so more collisions and more
energy lost. As the energy from the electrons is lost in collisions it
is gained by the metal ions. (This is then transferred into heat.)
The more resistance in a wire, the higher voltage it would have, and
lower energy the current, would have.
The purpose of this lab was to calculate the specific heat of a metal cylinder
Aluminum is a lightweight, silvery metal. The atomic weight of aluminum is 26.9815; the element melts at 660° C (1220° F), boils at 2467° C (4473° F), and has a specific gravity of 2.7. Aluminum is a strongly electropositive metal and extremely reactive. In contact with air, aluminum rapidly becomes covered with a tough, transparent layer of aluminum oxide that resists further corrosive action. For this reason, materials made of aluminum do not tarnish or rust. The metal reduces many other metallic compounds to their base metals. For example, when thermite (a mixture of powdered iron oxide and aluminum) is heated, the aluminum rapidly removes the oxygen from the iron; the heat of the reaction is sufficient to melt the iron. This phenomenon is used in the thermite process for welding iron .
A thermometer * A clamp * A Bunsen burner * A stop clock Method = =
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The purpose of performing this lab was to find the specific heat capacity of an unknown metal.
Obtain a sample of metal that has been immersed in boiling water and place it in the cup of water.
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I also decided to use a wooden block to keep hold of the wire, because
Investigating the Effect the Thickness of a Wire has on Its Resistance. Equipment:.. Nickel Wire cut into 10 pieces of 30cm length (Ruler, Pliers). Two crocodile clips Five Pieces of Wire Power Source Variable Resistor Ammeter Volt Meter Method: The.. =
Iron is this starting point for steelmaking which has performed as a backbone to the advancement of modern technology and is vital to the upbringing of the future. It acts as the predominant reason for the industrial revolution. The foundation that is iron, more industrially known as Cast Iron has been given the second honour as it is the one of the cheapest materials for engineering, when taken to molten temperatures it gains the ability to be cast into intricate shapes. Cast Iron has been sub-divided into 5 different classes when the composition is changed or tampered with. Each of these classes have different properties but in comparison with Steel which also has its grades ranging from low to high grade carbon steel which are just alloys of purified iron with carbon and hints of other metal elements such as Manganese and Nickel so the production of Steel products differs only slightly from the commercial production of Iron. Steel which is the easily formed, cheap and yet strong and tough allowing for it to be extremely versatile creating products ranging from paperclips to reinforcing elements in the construction of buildings and skyscrapers.
Factors Affecting the Resistance of a Wire The aim of this experiment is to investigate one factor that affect the resistance of a wire. I will do this by performing an experiment. First I will need to identify the factors that effect resistance. There are a few factors that affect the resistance, it is determined by the properties an object has.
The specimen must be regularly shaped in the form of a wire; its diameter. should be measured at six different points. Variables and Controls:. The variables that I will be using are the length and diameter of the
The Web. The Web. 28 Apr. 2014. The 'Standard' of the 'Standard'. Metal Melting 101 - How To.