JIPMER2017PhysicsLaws of Motion
The mass of a proton is 1847 times that of an electron. A electron and a proton are injected into a uniform electric field at right angle to the direction of the field with the same initial K.E.
Options
- Athe electron trajectory will be less curved than the proton trajectory.
- Bboth the trajectories will be straight.
- Cthe proton trajectory will be less curved than the electron trajectory.
- Dboth the trajectories will be equally curved.
Correct answer
D. both the trajectories will be equally curved.
Step-by-step solution
K= 1 2 m V^2 . In electric field, Y= q E X^2 2 m V^2 = q E X^2 4 K The curvature of the trajectory is proportional to q E / K . Since q, E and K are same for both particles, hence the trajectories will have the same curvature.