Ans. The radius of the path followed by a charged particle in a magnetic field depends on its velocity. The higher the velocity of the charged particle, the larger the radius of its path. Conversely, if the velocity decreases, the radius of the path also decreases. This relationship can be described by the equation R = (m*v)/(q*B), where R is the radius, m is the mass of the particle, v is its velocity, q is its charge, and B is the magnetic field strength.