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Moving Charges and Magnetism question

2022 · Q143
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Moving Charges and Magnetism question

2022 · Q143

NEETPhysicsMoving Charges and MagnetismMCQ+4 / −1

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 (Idl) 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.

  1. A
    Both Statement I and Statement II are correct
  2. B
    Both Statement I and Statement II are incorrect
  3. C
    Statement I is correct and Statement II is incorrect
  4. D
    Statement I is incorrect and Statement II is correct
View written solutionFree

Correct answer: C

According to Biot-Savart's law $$d\overrightarrow B = {{{\mu _0}} \over {4\pi }}{{Id\overrightarrow l \times \overrightarrow r } \over {{r^3}}}$$ which is applicable for infinitesimal element. It is analogous to Coulomb's law, where $Id\overrightarrow l $ is vector source and electric field is produced by scalar source q. Here statement I is correct and statement II is incorrect.

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