What is resistance? Mention it's s.i unit
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Resistance is the property of a material by virtue of which it opposes the flow of electrons through the material. It restricts the flow of the electron through the material. It is denoted by (R) and is measured in ohms (Ω).
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Resistance of a substance is defined as the ability of a material to resist the flow of charge from it. SI unit is Ohm.
two formula of resistance are
R=V/I (FROM OHMS LAW)
R =rho L/A
here V= potential difference
I =current
rho= resistivity of material
L=length
A = Area of cross section
R= Resistance
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