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Solution


Q.

Given below are two statements:                                      [2022]

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 Both Statement I and Statement II are correct.  
2 Both Statement I and Statement II are incorrect.  
3 Statement I is correct and Statement II is incorrect.  
4 Statement I is incorrect and Statement II is correct.  

Ans.

(3)

Statement I is correct, but statement II is incorrect because the magnetic field is produced by vector source Idl and the Coulomb’s force is produced by scalar source q.