List of top Physics Questions on Magnetic Field on the Axis of a Circular Current Loop asked in CUET (UG)

A charge \(q\) coulomb is circulating in an orbit of radius \(r\) metres making \(n\) revolutions per second. The magnetic field (in N/A m) produced at the centre of the circle is

A charge of 5 μC moves with a speed of $2 \times 10^6$ m/s along the positive y-axis. A magnetic field $\vec{B}$ of strength ($2\hat{i}+ \hat{k}$)T exists in space. The magnetic force acting on the charge is :