the relativity between resistance and resistivity
Answers
Answer:
Resistivity is the microscopic property and resistance is the macroscopic property. Resistivity is a property of the material, resistance depends on the size and shape.
Resistivity describes how many conducting particles there are per unit volume, how much charge they carry and how fast they move in an electric field.
Resistance describes the relationship between current and potential (voltage) in a circuit. It depends on resistivity but also on the length and cross sectional area of the material in question (so it depends on the total number of electrons and how long of a distance they need to traverse)
Thus rho = n*q*mu (n the concentration, q the charge and mu the proportionality constant between electric field and particle velocity).
And, R = rho * L/A (rho as above, L the length of the conductor and A the cross sectional area).
You can think of the charge carriers like the flow of water and the potential (the voltage) like the pressure of the water. A longer, narrower pipe “resists” the flow more than a shorter, wider pipe.
☺ａｎｓｗｅｒ:
⭕️Resistivity is also known as electrical resistivity.
⭕️Its a property that quantities how strongly a material opposes the flow of electric current.
⭕️A low resistivity indicates a material that allows the flow of electric current.
⭕️Its SI unit is ohm (symbol - Ω).
⭕️It's named after German physicist Georg Simon Ohm.
⭕️Resistivity of a conductor is a property of the material of the conductor.
⭕️ Unit of resistivity is Ohm meter, Ω m.
⭕️Resistivity of the material of the conductor changes with temperature.
⭕️Resistivity of copper is 1.7 × 10 -8 Ω m at room temperature.
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘꜱ ʏᴏᴜ. ☺❤