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What is resistance?
Member rating: No Rating | Words: | Submitted: Mon Sep 08 2003
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PLANNING What is resistance? Electricity is conducted through a conductor; in this case it is conducted through a wire through means of free electrons. The number of free electrons depends on the material. The more free electrons the better the conductor is. For example, gold has more free electrons than iron therefore gold is the better conductor. The greater the resistance tin a circuit the less current that flows. A variable resistor is able to control the amount of current that flows through a circuit. Increasing the length of wire will increase the resistance. Ohms Law is when the voltage is directly proportional to the current. This means that when the voltage is doubled the current is doubled as well and if the voltage was cut in half the current would cut in half as well. The symbols used in ohms law are V for volts, R for resistance, measured in ohms, and I for...
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