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Free Metal Conductor Essays and Papers

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    Establishing the Current-Voltage Relationship For a Metal Conductor Investigation- To Establish The Current- Voltage Relationship For A Metal Conductor. In this experiment I will be investigating the current- voltage relationship for a metal conductor. The variables that I need to keep constant in this experiment are: 1. Thickness of the wire. 2. Length of the wire 3. Input of voltage coming from the power supply should be kept constant. 4. Temperature of wire should be

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    Investigating the Factors that Affect the Resistance of a Metal Conductor All metals offer some resistance to the flow of an electric current. Several factors affect the resistance: * Temperature * Length * Cross-section area * The metal or alloy the conductor is made of This investigation looks at the effect of length. Background Information ====================== Why does resistance occur? ========================== Resistance occurs because the electrons in

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    Investigating the Resistance of a Wire The aim of this investigation is to see how the length of a wire affects its resistance. Background knowledge To make current flow through a conductor, there must be a potential difference (voltage) across it. As the current continues to flow there are certain factors which increase the resistance; Length of wire: as the length increases there will be a higher percentage of fixed atoms, therefore the electrons carrying the charge will collide

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    dimensions and its temperature. Resistivity is expressed in terms of Ohms / cm3 at 20ºC. An electrical conductor is any material that offers little resistance to the flow of an electric current. The difference between a conductor and an insulator, which is a poor conductor of electricity, is one of degree rather than kind, because all substances conduct electricity to some extent. A good conductor of electricity, such as silver or copper, may have a conductivity billions of times as great, or more

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    The Resistance of a Wire

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    piece of metal and the current flowing through it. The law states the following: For a metal conductor at constant temperature, the current flowing through it is directly proportional to the voltage across it. It is also relevant to know of Ohm's Law, which states that the current through a metallic conductor (e.g. wire) at a constant temperature is proportional to the potential difference (voltage). Therefore V ¸ I is constant. This means that the resistance of a metallic conductor is constant

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    V represent voltage which is the potential difference across the two ends of a electrical conductor and between which an electric current, I, will flow. The constant, R, is called the conductor's resistance. Thus by the Ohm's Law, one can determine the resistance R in a DC circuit without measuring it directly provided that the remaining variable V and I is known. A resistor is a piece of electric conductor which obeys Ohm's Law and has been designed to have a specific value for its resistance. As

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    Thomas Edison

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    this time he stoped sleeping and only took cat-naps so he could work on experiments at night in the bagage car. An accident at this time led to a loss of hearing about 50%. Two things which contributed to loss of his hearing was a conductor pulling on his ear and, a conductor clapping his ears for setting the bagage car on fire it was only an accident. Soon after he left this job. A station agent taught him telegraph code and procedures, and at age 15, Edison became manager of a telegraph office. His

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    Electrical Resistance

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    Electrical Resistance Electrical resistance is a property of an electrical circuit that opposes the flow of current. Resistance involves collisions of the current-carrying charged particles with fixed particles that make up the structure of the conductor. Resistance is often considered as localized in such devices as lamps, heaters and resistors in which it predominates, although it is a characteristic of every part of a circuit, including connecting wires and electric transmission lines. In

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    Copper

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    that it has 29 proton and 35 neutrons. Copper is a transition element and is found in column eleven of the periodic table. That means that it has 11 electrons in it valence shell. A valence shell of an atom is the last shell of electrons. Copper is a metal, which lies in period 4 of the Periodic table. Other basic properties include having a density of 8.96grams/ centimeters3. Density is a measure of mass per unit of volume in a substance. Copper has a melting point of 1083.3 degrees Celsius. A melting

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    energy is being passed on to the metal cup over most of its inner surface. 2. CONDUCTION - the metal cups will get hotter as a result of the heat energy inside the cup. The water will pass on this heat energy due to the fact that metal is a good conductor of heat. The heat energy will be conducted throughout the metal cup to the outer surface where it will be transferred to the air around the cup as radiation. 3. RADIATION - hot objects (i.e. the metal cup) emit mainly INFRA-RED radiation

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