A proton is fired with a speed of 1.0 × 10⁶m/s through the parallel-plate capacitor shown in FIGURE P31.31. The capacitor??s electric field is E = (1.0 × 10⁵V/m, down).

a. What magnetic field B, both strength and direction, must be applied to allow the proton to pass through the capacitor with no change in speed or direction?b. Find the electric and magnetic fields in the proton??s reference frame.

c. How does an experimenter in the proton??s frame explain that the proton experiences no force as the charged plates fly by?

Transcribed Image Text:

++++++++++++++++ E FIGURE P31.31