Question

A charged particle with a positive net electric charge travels with a velocity of 2x10⁷m·s^-1 in the positive -direction between two plates of a parallel plate capacitor. A uniform magnetic field of 4 mt that is directed into the page also exists in the same location as the capacitor.

 

a If the parallel plates of the capacitor are separated by 2 cm, determine the voltage required over the plates in order to stop any deflection of the particle. 

b. If there is no deflection, determine whether the top plate or bottom plate is positive.

• Top plate is positive

• Bottom plate is positive

Answer 1