An Investigation into Factors Affecting Resistance of a Wire
Plan:
The possible variables I could use to find out factors affecting
resistance are material wire is made of, length of wire, temperature
and cross sectional area of wire. I will use cross sectional area of
wire and length of wire because I think it will be hard to draw
conclusions from the material of wire. I am not doing temperature
because it would be hard to get results from and I think they wouldn't
be as accurate.
I will set up a circuit to find out how length and cross sectional
area affect resistance.
I will need the following components in my circuit to gather all of
the necessary results:
· Component holder- So I can change the wire that I am testing.
· Voltmeter- Measuring potential difference across the wire, it will
have to be across the wire and not just anywhere in the circuit so it
is measuring the P.D across the wire I am testing only.
· Ammeter - measuring current of the circuit, with his and the
voltmeter I will be able to work put resistance (R=V/I). As a safety
consideration I will keep the Current under 0.5 amps, so the wire
doesn't get too hot.
· Rheostat- So I can vary the voltage in the circuit to take two
readings for each wire at different voltages, I will work out an
average of the two to reduce the margin of error.
· Switch- A safety consideration, so the wire doesn't overheat and
burn if the circuit is left on for too long.
I have decided to test length of wire at, 10cm, 30cm, 50cm, 70cm,
90cm, 110cm, 130cm, 150cm and 170cm keeping a constant cross sectional
area of 0.028mm2. I will test cross sectional area at the Cross
sectional areas of wire: 0.028 mm2, 0.045 mm2, 0.057 mm2, 0.113 mm2,
0.166 mm2 and 0.246 mm2, keeping a constant length of 50cm. My
preliminary work reviled that these were the best constants, and
I also decided to use a wooden block to keep hold of the wire, because
From this I can tell I can use 3 volts and resistance wire that is
Factors that Effect the Resistance to a Piece of Wire Aim; My aim is to find out what factors (variables) effect the resistance to a piece of wire. Scientific knowledge; To work out the resistance I would use this formula; R= V I And to work out the current I would use this formula; Folded Corner: Voltage (V) is measured in volts = V Current (I) is measured in ammeters = A Resistance (R) is measured in ohms = Ω I =
there will be. So if the length of the wire were to double, so would
V is voltage in volts and I is current in amperes. L:- is the length
Investigating Resistance of a Wire The aim of this experiment is to find out how the resistance changes as the length of wire changes within the circuit changes. At the end of this investigation I will come to one of five possible conclusions which are: -the resistance increases as the length of wire increases, or -the resistance decreases as the length of wire increases, or -the resistance is constant as the length of wire changes, or -the resistance increases as the length of wire decreases, or -the resistance decreases as the length of wire decreases. Scientific background: Electricity is simply the flow of electrons, a cell produces electricity. Lots of cells joined together form a battery. A battery pushes electrons round a circuit from the negative terminal to the positive terminal.
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.
Instead of using a metal I decided to use a thermistor as it can be
Investigating how the Resistance of a Constantin Wire is Affected by Its Length. Introduction: In this experiment we will be investigating how change is made. the length of a piece of Constantin wire will affect the resistance.
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.. =
How Thickness and Length Affect the Resistance of a Wire? I plan to investigate how the length and thickness of a wire affects the resistance to the. I plan to do this by keeping the voltage the same. using a variable resistor and measure the current at varied lengths. and thicknesses of wire in a circuit.
Investigating the Factors that Affect the Resistance of a Wire. Aim To study the factors that affect the resistance of a wire. Background Information Current and potential differences measure different things. they are related to each other.
Investigating the Relationship Between the Length of a Wire and Its Resistance Aim: To find the relationship between the length of a wire and it’s resistance. Planning: We conducted a preliminary experiment to help us conduct the real experiment. In this preliminary experiment we aimed to find out what thickness and type of wire would be suitable for the experiment, and what range of lengths of wire and range of voltages and currents would be suitable for measuring. We discovered that at too great a voltages and too short a length, the wire became very hot. One time it melted, in a way similar to a fuse, because of the hot temperature, but this was only when we tested a length of 2cm.
of the atoms, so if there are more or larger atoms then there must be
Investigating How the Length of the Wire Affects the Resistance of the Current Passing Through Wire