Question

FIGURE Q37.6 shows a magnetic field between two parallel, charged electrodes. An electron with speed $v_o$passes between the plates, from left to right, with no deflection. If a proton is fired toward the plates with the same speed $v_o$,will it be deflected up, deflected down, or pass through with no deflection? Explain.

Short answer

Proton will pass through plates with no deflection.

Step-by-step solution

Given information

We have given that an electron with speed v₀ is passed through oppositely charged plates having magnetic field between them . The electron passes left to right without deflection.

Explanation

We all know that charge on electron and proton is same. Now, the electron and proton both are fired towards the plates having uniform magnetic and electric field with same velocities and parallel to the plates due to which force applied by magnetic field will be same as that applied by electric field but in opposite direction. So the path of proton will be same as that of electron i.e. straight without any deflection.