A positive charge q is placed half way between two long parallel plates that reseparated by a distance 2d. The charge on one of the plates is Q and the charge on the other plate is -Q. The potential difference between the plates is V. What is the magnitude of the force of the charge q?

Shown are four arrangements of two unequal positive point charges separated by various distances. Which two arrangements results in the electric potential energy?

The figure shows two oppositely charged parallel plates a distance d apart.

A proton is launched from the negative plate with initial speed u. The proton just reaches the positive plate. Which graph represents the variation of the speed v of the proton with distance x from the negative plate?

An amount of positive charge Q is placed uniformly on a large plane surface. A small positive point charge q placed a perpendicular distance r from the surface experience a force F.

What is the magnitude of the electric field at the position of the small charge q?

Two charges M and N are separated by a certain distance, as shown in the diagram.

Graphs I, II, and III show the variation of electric potential $V_e$ With distance x from the centre of charge M.

Which of the possibilities below applies o the case of two equal and opposite charges?

A sphere of radius $0.25 \mathrm{m}$ has positive charge $+8.8 \mathrm{\mu C}$ uniformly distributed on its surface. A small pellet of mass $0.075 \mathrm{kg}$ and charge $+2.4 \mathrm{\mu C}$ is directed radially at the sphere. When the pellet is at a distance of 0.75 m from the centre of the sphere its speed is $3.2 \mathrm{m} {\mathrm{s}}^{-1}$.

$\mathrm{a}.$ Determine the distance from the centre of the sphere at which the pellet will stop.

A sphere of radius $0.25 \mathrm{m}$ has positive charge $+8.8 \mathrm{\mu C}$ uniformly distributed on its surface. A small pellet of mass $0.075 \mathrm{kg}$ and charge $+2.4 \mathrm{\mu C}$ is directed radially at the sphere. When the pellet is at a distance of $0.75 \mathrm{m}$ from the centre of the sphere its speed is $3.2 \mathrm{m} {\mathrm{s}}^{-1}$.

$\mathrm{b}.$ Describe qualitatively the subsequent motion of the pellet.

A sphere of radius $0.25 \mathrm{m}$ has positive charge $+8.8 \mathrm{\mu C}$ uniformly distributed on its surface. A small pellet of mass $0.075 \mathrm{kg}$ and charge $+2.4 \mathrm{\mu C}$ is directed radially at the sphere. When the pellet is at a distance of $0.75 \mathrm{m}$ from the centre of the sphere its speed is $3.2 \mathrm{m} {\mathrm{s}}^{-1}$.

$\mathrm{c}.$ Determine the speed of the pellet after it moves very far from the sphere.