The amount of electrical current that flows in a circuit depends on the resistance that the conductor offers to the flow of charge. It also depends on the voltage or potential difference provided by the voltage source in the circuit, like the battery. A conductor with a high resistance is sometimes called a resistor and its presence in an electrical circuit can be represented using different symbols, as shown in the figures. The electrical resistance of a wire or any other object depends on the material the object is made of, and also on the thickness and the length of the object. How
do the type of material, the lenght, and the thickness of a conductor
affect its resistance? |
