List of top Physics Questions on Magnetic Field Due To A Current Element, Biot-Savart Law asked in VITEEE

A (+)vely charged particle is placed near an infinitely long straight conductor where there is zero gravity. Then

A current of $2\,A$ is flowing in the sides of an equilateral triangle of side $9\, cm$. The magnetic field at the centroid of the triangle is

In hydrogen a atom, an electron is revolving in the orbit of radius $0.53\,�$ with $6.6 \times 10^{15}$ radiations/s. Magnetic field produced at the centre of the orbit is