question_answer

Which of the following gives the value of magnetic field according to,  Biot-Savart?s law?                                [BHU 2000]

A)    \[\frac{i\Delta l\sin \theta }{{{r}^{2}}}\]               

B)    \[\frac{{{\mu }_{0}}}{4\pi }\frac{i\Delta l\sin \theta }{r}\]

C)    \[\frac{{{\mu }_{0}}}{4\pi }\frac{i\Delta l\sin \theta }{{{r}^{2}}}\]           

D)    \[\frac{{{\mu }_{0}}}{4\pi }i\Delta l\sin \theta \]