Essays Tagged: "Ohm's law"

An experiment to investigate the factors which affect the resistance in a wire.

t causes current to flow in a circuit. It is measured in VOLTS (V or E). Take a look at the diagram.Ohm's Law"The amount of current flowing in a circuit made up of pure resistances is directly proport ... the circuit and inversely proportional to the total resistance of the circuit."Or in simpler terms ohm's law is a steady increase in voltage, in a circuit with constant resistance, produces a constan ...

(7 pages) 90 0 5.0 Jan/2003

Subjects: Science Essays > Physics

Pysics invstigation as to what factors afect resistance in a circuit.

ve force or potential difference, in volts (V) divided by the current, in amperes (I) - Ohm´s law.As the length of the wire is increased the number of collisions the current carrying charged par ... o crocodile clips:- 10 cm- 15 cm- 20 cm- 25 cm- 30 cm- 35 cm- 40 cm- 45 cm- 50 cm5. Use Ohm´s law to find the resistance of the wire, equation (1).Diagram:Safety: this is not a very dangerous ex ...

(7 pages) 37 0 3.0 Jul/2003

Subjects: Science Essays > Physics

GCSE Physics Coursework - Resistance of a Wire Coursework Resistance of a Wire

= I ¢¥ R where V = Voltage, I = Current and R = ResistanceThis can be rearranged to:R = VIOhm's LawIt is also relevant to know of Ohm's Law, which states that the current through a metallic ... gation but it might have been an issue had we used batteries instead.NB: If one were to assume that Ohm's Law applies, then another possible explanation could be that at some points (more likely in th ...

(6 pages) 141 0 3.3 Jan/2004

Subjects: Science Essays > Physics

Resistance in a wire- good essay.

AimInvestigating the factors that affect resistance in a wire.TheoryOhm's law states the V=IR, with 'V' being voltage, 'I' being current and 'R' being resistance. Volta ... red the current and resistance in the wire, in ten centimetre intervals, using an ammeter and using Ohm's law. Like before, we wrapped another piece of nickel chrome wire around to double the thicknes ...

(5 pages) 52 0 0.0 Feb/2004

Subjects: Science Essays > Physics

Plan for Science Course Work The Resistance of Lengths of Wire

together so that I can subtract the resistance of the circuit's wire.Fair Test:I will try to follow Ohm's Law: the resistance of a metal wire or a piece of carbon will stay the same as conditions are ...

(6 pages) 71 0 4.1 Feb/2004

Subjects: Science Essays > Physics

Factors affecting the resistance of a wire

rking out the resistance of a circuit, which was:R= V ÷ IV- VoltsI- CurrentR- ResistanceOhms law says the more resistance means more energy is needed for the current to pass through the wire. R ...

(5 pages) 34 0 3.0 May/2004

Subjects: Science Essays

Physics coursework - Resistance of a wire

la:V = I ´ R where V = Voltage, I = Current and R = ResistanceThis can be rearranged to:R = VIOhm's LawIt is also relevant to know of Ohm's Law, which states that the current through a metallic ...

(3 pages) 42 0 3.0 Jul/2004

Subjects: Science Essays > Physics

The Resistance Of A Wire

asurements are then applied to this formula:Gradient = resistanceV = I x RThe other ways of writing Ohm's Law are:R = V/I or I = V/ROhm's LawIt is also relevant to know of Ohm's Law, which states that ... entire investigation is repeated for accuracy.7. Work out the resistance for all the results using Ohm's law. V = I*R8. Record your results in a graph.SafetyIn order to perform a safe experiment, a l ...

(3 pages) 24 0 4.3 Dec/2004

Subjects: Science Essays > Physics

OHM'S LAW

f this lab is for student's to investigate the relationship between the three variables involved in Ohm's Law- Current, Voltage, and Resistance.Theory: The Ohm's law states that the direct current flo ... h a voltmeter (12 V Full-Scale).A. Variation of current with voltage keeping R constant.1. Applying Ohm's Law, for each value of I and Vr in Table I compute R and record these values in table I.2. Det ...

(4 pages) 25 0 4.0 Dec/2005

Subjects: Science Essays > Physics

A Physics Investigation of the Resistance: Of A Piece of Wire?

hms (Ω) is equal to the Voltage, in volts (V) divided by the current, in amperes (A). This is Ohm's law.The number of free electrons depends on the material and the more free electrons there is ...

(9 pages) 33 0 5.0 Dec/2005

Subjects: Science Essays > Physics

Length affects the resistance

voltage (V). I will be using both of these devices in my experiment. Their symbols are shown bellow:Ohm's lawIn 1827, a German physicist discovered relationship that the amount of steady current throu ... al is called its resistance, R, measured in units named ohms. The resistance of materials for which Ohm's law is valid does not change over enormous ranges of voltage and current.Ohm's law may be expr ...

(14 pages) 36 0 5.0 Feb/2006

Subjects: Science Essays > Physics

Resistance of Wire

current flow is constant so that the current in the circuit is related to voltage and resistance by Ohm's law.I = V/RThe unit of electric charge is the coulomb. Ordinary matter is made up of atoms whi ... the faster moving particles therefore the more energy lost through collisions. This also relates to Ohm's law especially in one of the graphs I predict that there will be a straight line showing Ohms' ...

(7 pages) 30 0 1.0 Feb/2006

Subjects: Science Essays > Physics

To investigate the factors of affecting the resistance of a wire.

Physics Coursework- Ohm's LawAim: To investigate the factors of affecting the resistance of a wire.In this experiment I ... ble I can also see a trend, where as each width increased the resistance in a proportion of about 2 ohm's. When looking at the graph to show the resistance of different lengths, I can see that there i ... the first set of results for both width and length, but there were some readings off by a couple of ohm's, which could have been accounted from misreading, although I believe I have enough results to ...

(8 pages) 28 0 5.0 Feb/2006

Subjects: Science Essays > Physics

Resistance of a wire (GCSE corsework)

is measured in ohms (the greater the ohms the grater the resistance. Ohms are calculated using ohms law. Ohms law is the link between:Potential difference (volt, V) Current (ampere, A) Resistance (ohm ... e same (when variable resister was rite down the voltages for all lengths were similar )I used ohms law toUse metallic structure of wire to explain what have found?My results do support my prediction ...

(7 pages) 18 0 0.0 Mar/2006

Subjects: Science Essays > Physics

Resistance of a wire

n a metal is bent the shape changes but the free electrons continue to hold the metal ions together.Ohm's LawIt is also relevant to know of Ohm's Law, which states that the current through a metallic ...

(3 pages) 17 0 3.0 Mar/2006

Subjects: Science Essays > Physics

An investigation into how the diameter of a wire affects its resistance

themselvesWhen planning my investigation I will be making use of the following scientific knowledge:Ohm's Law: An ohm is a unit used in the international system of measurements to measure resistance. ... device, I is the current, and R is the resulting resistance. In order to calculate Resistance using Ohm's Law I will need to understand the following things:Current: A measure of the flow of electrons ...

(11 pages) 16 0 3.0 Apr/2006

Subjects: Science Essays > Physics

This is a note/assignment for class

carries electrical energy without much resistance, so electrons lose little energy. Example, Copper-Ohm's Law is V = I X R, or Voltage Drop = Current X Resistance-A Circuit breaker has two different s ...

(2 pages) 11 0 0.0 May/2006

Subjects: Science Essays > Physics

Physic Sc1 Resistance Of A Wire

ire that I used in my investigation could be described as Ohmic. Ohmic in the sense that it follows Ohm's law. Ohm said that "˜for some conductors, the current flowing is proportional to the vol ...

(6 pages) 1938 0 0.0 Nov/2001

Subjects: Science Essays > Physics

Planning & Designing Experiment: Investigating the current - potential difference relationship (IV Characteristics) for a metal wire.

f current flowing in the circuit for any given voltage applied to the circuit. This is according to Ohm's law. The unit of resistance is the Ohm which has the Greek letter 'Omega (Ω)'. By defaul ... n (Rocky) Appadu Theory: Current -1 Resistance = Potential Difference Hypothesis: With reference to Ohm's law, by varying the potential difference (using the rheostat), the current will increase linea ...

(5 pages) 22 2 5.0 May/2008

Subjects: Science Essays > Physics