KcetMoving Charges And MagnetismKCET 2018MCQ+1 / -02018An electron is moving in a circle of radius $r$ in a uniform magnetic field $B$. Suddenly, the field is reduced to $\frac{B}{2}$. The radius of the circular path now becomesA$\frac{r}{2}$B$2 r$C$\frac{r}{4}$D$4 r$Check AnswerClear SelectionReveal AnswerShow Explanation
