Effect of temperature on conductivity and resistance
When the temperature of a wire increases, the resistance value of the wire will also increase and therefore the conductivity of the wire will reduce.
The resistance of a conductor is a measurement of the opposition to the current flowing in it. The value of the resistance will increase as the length of the conductor is made longer and the resistance will reduce when the diameter of the conductor is increased. The value of resistance is measured in ohms.
Electrical conductivity measures the ability of a conductor to allow current to flow in it. Therefore conductivity is the inverse of resistance. The higher the resistance of the wire, the lower the conductivity will be.
Resistance = 1 / Conductivity
Ohm’s Law states that when a current I ampere flows inside a conductor of resistance R ohms, the voltage V volt across the wire will be the product of the current and the resistance.
Voltage V = Current I x Resistance R
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