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GNVQ Science Unit 1 and 3 Investigating Electricity Section A: Voltage, Current and Resistance and Ohm's Rule Firstly, to being this assignment I will be introducing what exactly Ohm's rule is and what voltage, current, and resistance is and how they are measured. * Resistance: - resistance is a measure of the degree to which an electrical component opposes the passage of current. It is the ratio of the potential difference (i.e. voltage) across an electric component (such as a resistor) to the current passing through that component: R is the resistance of the component. If the resistance of a material is low then charges can pass through it easily. (Resistance = Voltage ÷ Current) * Current: - Electric current is the rate of charge flow past a given point in an electric circuit, measured in coulombs/seconds which is named amperes. In most DC electric circuits, it can be assumed that the resistance to current...

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