resistance and factor affecting the resistance of a conductor
Resistance :-- Resistance is the property of a conductor to resist the flow of charges through it. Also resistance is to oppose the flow of electric current in circuit. Resistance is represented by caps letter (R) . SI unit of R is (Ω) (Ω) :-- Its represented by Greek letter. And also called as omega Factors on which the resistance of a conductor depends:-- (1) On its length (2) On its area of cross – section (3) On its nature of the materials (4) And its Temperature (1) Length :-- On applying the ohms law , we observed that resistance of the conductor depends on the length of the conductor. Resistance of a uniform metallic conductor is directly proportional to its length which is denoted as (l). so that resistance will increased , when the length of the wire increases. R ∝ l (2) Area of the cross-section :-- On applying the ohms law , w