Question

Diagram shows an electron gun inside a cathode ray tube. Draw a pair of plates $P_{1}and{P}_2$ to apply the electric field in the diagram and show the deflection of the particles emitted by X in between the plates $P_{1}and{P}_2$.

Answer 1

The electricity is applied in vertically downward direction. i.e From plate $P_1$ to $P_2$. Since force exerted on the charged particle has same direction as that of electric field (if the charged particle is positive) i.e in case of protons and the opposite force exerted on the charged particle if the charged particle is negative.