Embibe Experts Solutions for Chapter: Electrostatics, Exercise 1: Exercise 1

Two point charges placed at a distance $r$ in air exert a force $F$ on each other. The value of distance $R$ at which they experience force $4F$ when placed in a medium of dielectric constant $K=16$ is,

A total charge of $20 \mathrm{\mu }\text{C}$ is divided into two parts and placed at some distance apart. If the charges experience maximum Coulombian repulsion, the charges should be,

The magnitude of electric force on $2 \mathrm{\mu C}$ charge placed at the centre $O$ of two equilateral triangles each of side $10 \mathrm{cm}$ as shown in figure is $P$. If charge $A, B, C, D, E$ and $F$ are $2 \mathrm{\mu C}, 2 \mathrm{\mu C}, 2 \mathrm{\mu C}, -2 \mathrm{\mu C}, -2 \mathrm{\mu C} \text{and} -2 \mathrm{\mu C}$ respectively, then $P$ is,

There is a uniform electric field in $X$-direction. If the work done by external agent in moving a charge of $0.2 \mathrm{C}$ through a distance of $2 \mathrm{m}$ slowly along the line making an angle of $60°$ with $X$-direction is $4 \mathrm{J}$, then the magnitude of $E$ is,

Two equal positive charges are kept at points $A$ and $B$. The electric potential, while moving from $A$ to $B$ along straight line,

A semicircular ring of radius $0.5 \mathrm{m}$ is uniformly charged with a total charge of $1.5\times {10}^{-9} \mathrm{C}$. The electric potential at the centre of this ring is,

When a charge of $3 \mathrm{C}$ is placed in a uniform electric field, it experiences a force of $3000 \mathrm{N}$. The potential difference between two points separated by a distance of $1 \mathrm{cm}$ along field within this field is,

A $5 \mathrm{C}$ charge experiences a constant force of $2000 \mathrm{N}$ when moved between two points separated by a distance of $2 \mathrm{cm}$ in a uniform electric field. The potential difference between these two points is,