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  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.   ...

  OHM’S LAW OHMS LAW:-- Ohms law provides relationship between the potential difference and current flowing through the metallic conductor in a circuit.   Ohms law states that , at a constant temperature , there is relationship between the current carrying conductor (I) , flowing through the metallic wire or conductor   and potential difference (V) is crossing through its terminal. Now, in an electric circuit, the potential difference (V) , across the ends of the metallic wire is directly proportional to the current flowing through it. This is called ohms law. Mathematically , this law can be expressed as follows:--   V      ∝       I Or , I    ∝     V V/I     =      constant V/I     = R Here R is the resistant. SI unit of R is      (Ω) (Ω) :-- Its represented by Greek letter. And also called as omega   According to ohms law, ...