Define the term resistivity.
Answers
Resistivity??
What's is? (*﹏*;)
Resistivity is the measure of how much an electrical conductor opposes the flow of current through it.
Resistance has an application in protecting the circuit from high current flow.
When a potential difference (acceleration) is applied across the conductor (to car), the electrons start moving from negative to positive electrode).
The current flow increases, the resistance acts as a speed breaker to the accelerated car (high current flow).
The magnitude of the resistance is called the resistivity.
Then, do there is any formula to calculate?
Yup, there is one Provided by NCERT ....
Resistivity of a material is defined in terms of measurement of electric Electric Feild (E) across it that generates current density (J).
The formula of resistivity is given by
And here ρ is the symbol of Proportionality in calculating Resistance.