Given below are two statements$:$

Statement $I:$ Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element (IdI) of a current carrying conductor only.

Statement $II :$ Biot-Savart's law is analogous to Coulomb's inverse square law of charge $q$, with the former being related to the field produced by a scalar source, Idl while the latter being produced by a vector source, $q$. In light of above statements choose the most appropriate answer from the options given below:

  • [NEET 2022]
  • A

    Both Statement $I$ and Statement $II$ are incorrect

  • B

    Statement $I$ is correct and Statement $II$ is incorrect

  • C

    Statement $I$ is incorrect and Statement $II$ is correct

  • D

    Both Statement $I$ and Statement $II$ are correct

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  • [IIT 2001]

Write formula for magnetic field due to a circular current carrying loop having $\mathrm{N}$ turns and $\mathrm{R}$ radius at a point on the axis of the loop.

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