Electric Charge...

A and B are two points on the axis and the perpendicular bisector respectively of an electric dipole. A and B are far away from the dipole and at equal distances from its centre. The fields at A and B i.e. $$\overrightarrow { { E }_{ A } } \quad and\overrightarrow { { E }_{ B } } $$ are respectively such that

An electric charge produces an electric intensity of $$500 N/C$$ at a point in air. If the air is replaced by a medium of dielectric constant $$2.5$$, then the intensity of the electric field due to the same charge at the same point will be:

 A particle A has charge +q and a particle B has charge +4q. each having the same m . allowed to fall from rest through the same electric potential difference. the ratio of the speed of A to that of B will e

Force between two charges at rest is____

There are two $$ +2 \mu C$$ and$$ -3 \mu C $$ some distance apart. The ratio of force acting on them will be 

Three charges $$+Q, q, + Q$$ are placed respectively, at distance, $$0, d/2$$ and $$d$$ from the origin, on the x-axis. If the net force experienced by $$+ Q$$, placed at $$x= 0$$, $$Ls$$ zero,then value of $$q$$ is :

The force of attraction between two charges $$8\mu C$$ and $$0.2 \,N$$. Find the distance of separation.

Which of the following is not a unit of charge ?

If point charges $$Q_1=2\times 10^{-7}C$$ and $$Q_2=3\times 10^{-7}C$$ are at. $$30cm$$ separation. Find electrostatic force them

Two charged particles having charges $$+ 25 \mathrm { mC }$$ and $$+ 50 \mathrm { mC }$$ are separated by a distance of 8 cm. The ratio of force on them is: