Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2007

  • question_answer
    Lengths of two wires are 50 cm, 100 cm respectively and their diameters are 1 mm, 2 mm then ratio between their specific resistances is

    A)  1:2                                        

    B)  1:1

    C)  2 :1                                       

    D)  1:4

    Correct Answer: B

    Solution :

    Specific resistance do not depend on the length and cross-section area of the wire. Therefore. \[\frac{{{\rho }_{1}}}{{{\rho }_{2}}}=\frac{1}{1}\]


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