Electric Charge...

Two point charges $$q_{1}$$ and $$q_{2}$$ are $$3\ m$$ apart and their combined charge is $$20\mu C$$. If one repels the other with a force of $$0.075\ N$$, what are two charges?

The SI unit of solid angle is

Consider an area element $$dS$$ at a distance $$r$$ from a point P. Let $$\hat r$$ be the unit vector along the outward normal to $$dS$$. If $$\alpha$$ is the angle between $$\hat r$$ and $$dS$$, the element of the solid angle subtended by the area element at P is defined as

A charge $$Q$$ is divided into $$2$$ parts and they are placed at a fixed distance. The force between the charges is always maximum when the charges are

Two charges $$q_{1}$$ and $$q_{2}$$ are kept on the x-axis and the variation of electric field strength at different points on the x-axis is described in the adjacent figure graphically. Choose correct statement nature are magnitude of $$q_{1}$$ and $$q_{2}$$.

Two charges of $$-2Q$$ and $$Q$$ are located at points $$(a,0)$$ and $$(4a,0)$$ respectively. What is the electric flux through a sphere of radius $$3a$$ centred at the origin?

Point charges $$q_1$$ and $$q_2$$ are placed in air at a distance 'r'. The ratio of the force on charge $$q_1$$ by charge $$q_2$$ and force on charge $$q_2$$ by charge $$q_1$$ is?

An electric charge $$q$$is placed at the centre of a cube of side $$a$$ The electric flux through one of its faces is

A charge $$Q$$ is located at the centre of a sphere of radius $$R$$. Calculate the flux going out through the surface of the sphere.

Find the charge on the sphere