Search This Blog

Google

Thursday 28 November 2013

Q.No.13.2: - Do bends in a wire affect its electrical resistance?

Q.No.13.2: - Do bends in a wire affect its electrical resistance?
Ans: - The resistance of wire is
                                       R   =  ρ.L/A

Where “ρ” is the resistivity of the conductor, L is the length and A is the area of cross section of the wire. So according to this equation we can say that bends in a wire will never affect the electrical resistance because we bending the wire its ρ, L and A remain same so its resistance remain same. 

3 comments:

  1. Thanks sir full note copy mil sakhti ha plzzzz

    ReplyDelete
  2. in some cases bends in wire affect its resistance because when we have a large bend then:
    1) Area decrease
    2) Length increase a bit
    3) resistance increase

    ReplyDelete