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