What is resistence? Give an expression for resistivity
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Hii...
Resistance is an electrical property of a conductor , which opposes/resists the flow of electric current through the conductor.
Its SI unit is 'ohm' .... and it is written as 'R'.
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Expression for Resistivity(also known as specific resistance) is :
R = rho× length / cross-sectional area
________________________________________
Hope this helps !
Resistance is an electrical property of a conductor , which opposes/resists the flow of electric current through the conductor.
Its SI unit is 'ohm' .... and it is written as 'R'.
_______________________________________
Expression for Resistivity(also known as specific resistance) is :
R = rho× length / cross-sectional area
________________________________________
Hope this helps !
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RESISTANCE
- It is the property of a conductor to resist the flow of charges through it.
- Its S.I unit is ohm (Ω).
R = V/I
Where,
- R = Resistance
- V = voltage
- I = current.
Factors on which the resistance of a conductor depends :-
- It depends on its length (L)
- It depends on its cross sectional area (A)
- It depends on the nature of material
R ∝ L/A
R = ρL/A
Where
- "ρ" (rho) is proportionally constant known as resistivity of the material of conductor.
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