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Back to category: Science Limited version - please login or register to view the entire paper. AIM: TO INVESTIGATE HOW THE ELECTRICAL RESISTANCE OF A WIRE CHANGES IN RELATION TO ITS LENGTH Gabriella Blake AIM: TO INVESTIGATE HOW THE ELECTRICAL RESISTANCE OF A WIRE CHANGES IN RELATION TO ITS LENGTH PLAN Introduction and background research · Resistance can be found using the equation Resistance = voltage current · It is measured in Ohms (Ώ) · Ohms Law states that the current (I) through a conductor is directly proportional to the voltage (V) across the conductor and inversely proportional to its resistance. · The resistance of a wire is effected by: - Ø Length Ø Diameter Ø Temperature Ø Type of metal Ø Cross-sectional area · In a conductor, some electrons break away from the atoms. These electrons move freely inside the conductor. When there is a voltage across a conductor, all of the free electrons arrange themselves in lines moving in the same direction. This forms an electrical current. Resistance is come across when the charged particles that... Posted by: Sandeep Jador Limited version - please login or register to view the entire paper. |
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