A cavity of radius r is present inside a solid dielectric sphere of radius R,
having a volume charge density of $ρ$ . The distance between the centres of the sphere and the cavity is a . An electron e is kept inside the cavity at an angle $θ =$ 45 as shown . How long will it take to touch the sphere again?
$\sqrt{\frac{2 \sqrt{2} m r ϵ_{0}}{e ρ a}}$
$\sqrt{\frac{3 \sqrt{2} m r ϵ_{0}}{e ρ a}}$
$\sqrt{\frac{5 \sqrt{2} m r ϵ_{0}}{e ρ a}}$
$\sqrt{\frac{6 \sqrt{2} m r ϵ_{0}}{e ρ a}}$

Question

A cavity of radius r is present inside a solid dielectric sphere of radius R,
having a volume charge density of $ρ$ . The distance between the centres of the sphere and the cavity is a . An electron e is kept inside the cavity at an angle $θ =$ 45 as shown . How long will it take to touch the sphere again?
$\sqrt{\frac{2 \sqrt{2} m r ϵ_{0}}{e ρ a}}$
$\sqrt{\frac{3 \sqrt{2} m r ϵ_{0}}{e ρ a}}$
$\sqrt{\frac{5 \sqrt{2} m r ϵ_{0}}{e ρ a}}$
$\sqrt{\frac{6 \sqrt{2} m r ϵ_{0}}{e ρ a}}$

Toppr Admin · Accepted Answer