A light charged particle is revolving in a circle of radius ' \(r\) ' in electrostatic attraction of a static heavy particle with opposite charge. How does the magnetic field 'B' at the centre of the circle due to the moving charge depend on 'r'?
(A) \(B \alpha \frac{1}{r}\)
(B) \(B \alpha \frac{1}{r^{2}}\)
(C) \(B \alpha \frac{1}{r^{\frac{3}{2}}}\)
(D) \(B \alpha \frac{1}{r^{\frac{5}{2}}}\)
Ans: (D)
