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BVP Medical BVP Medical Solved Paper-2002

  • question_answer
    A cell is connected between the points A and C of a circular conductor PQRS of centre O with angle \[\angle \]POR= 60°. If \[{{B}_{1}}\]and \[{{B}_{2}}\]are the magnitudes of magnetic fields at O due to the currents in PQR and PSR respectively, then the ratio of \[\frac{{{B}_{1}}}{{{B}_{2}}}\]will be

    A)  5:1                                        

    B)  2:1

    C)  10 : 1                                    

    D)  1 : 2

    Correct Answer: A

    Solution :

                    From Bio-savarts law the magnetic field at the centre is directly proportional to the length of current carrying segment. \[\frac{{{B}_{1}}}{{{B}_{2}}}=\frac{length\,of\,PQR}{length\,of\,PSR}\] \[=\frac{{{300}^{o}}}{{{60}^{o}}}=\frac{5}{1}\]


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