KVPY2013PhysicsMagnetic Effects of Current
An electron enters a chamber in which a uniform magnetic field is present as shown An electric field of appropriate magnitude is also applied so that the electron travels undeviated without any change in its speed thorugh the chamber. We are ignoring gravity. Then, the direction of the electric field is
Options
- Aopposite to the direction of the magnetic field
- Bopposite to the direction of the electron's motion
- Cnormal to the plane of the paper and coming out of the plane of the paper
- Dnormal to the plane of the paper and into the plane of the paper
Correct answer
D. normal to the plane of the paper and into the plane of the paper
Step-by-step solution
q E + q ( V B )=0 Hence, into the paper.