Physics (AS & A Level) · May / June 2018 · Paper 13 · Question 28

A particle having mass m and charge +q enters a uniform electric field with speed v. Initially, the particle is travelling at right-angles to the electric field. During its movement through the field, the particle is deflected through distance d, as shown. [diagram: path of particle entering a shaded region of uniform electric field, deflected through distance d] A second particle of mass 2m, charge +q and speed v enters the electric field along the same path. What is the distance through which this particle is deflected in the electric field?

1. Ad/4
2. Bd/2
3. C2d
4. D4d

As printed in the paper