A monovalent ion enters into a plane-parallel capacitor. The entrance angle, alfa=30 degrees,up against armatures.Find the kinetik energy of the ion.The ion comes out by keeping the same entrance...

A monovalent ion enters into a plane-parallel capacitor. The entrance angle, alfa=30 degrees,up against armatures.Find the kinetik energy of the ion.

The ion comes out by keeping the same entrance angle(the value is positive).

The length of capacitor is l=10cm and electric field intensity, E=40KV/m.

1 Answer | Add Yours

Top Answer

giorgiana1976's profile pic

Posted on

The problem is analogue to oblique projection in gravitational field, the only difference being that instead of gravitational acceleration g, we'll have the acceleration a=e*E/m

Then, the length of capacitor represents "tha range"

l=(v0^2/a)*sin 2 alfa=[m*v0^2/(e*E)]*sin 2 alfa

The kinetic energy is the semiproduct between the weight of the particle and it's square speed:

Ek=m*v0^2/2=e*E*l/(2 sin 2 alfa=0.37fJ=2.3KeV

We’ve answered 323,800 questions. We can answer yours, too.

Ask a question