Which of the following gives the value of magnetic field according to, Biot-Savart’s law

Options

A. `(iDeltalsintheta)/(r^(2))`
B. `(mu_(0))/(4pi)(iDeltalsintheta)/(r)`
C. `(mu_(0))/(4pi)(iDeltalsintheta)/(r^(2))`
D. `(mu_(0))/(4pi)(iDeltalsintheta)/(r^(3))`

Answer

C

Explanation

Magnetic field is given, as
`B=(mu_(0))/(4pi) (I Delta l sin theta)/(r^(2))`