A coil having $N$ $turns$ carry a current $I$ as shown in the figure. The magnetic field intensity at point $P$ is

128-108

  • A

    $\frac{{{\mu _0}NI{R^2}}}{{2{{({R^2} + {x^2})}^{3/2}}}}$

  • B

    $\frac{{{\mu _0}NI}}{{2R}}$

  • C

    $\frac{{{\mu _0}NI{R^2}}}{{{{(R + x)}^2}}}$

  • D

    Zero

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Assertion : The magnetic field at the centre of the circular coil in the following figure due to the currents $I_1$ and $I_2$ is zero.

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  • [AIIMS 2013]