Embibe Experts Solutions for Chapter: Electric Charges and Fields, Exercise 1: Exercise

State the law of conservation of charge

Write the value of one quantum of a charge.

If the dielectric constant of a medium is unity then what is its absolute permittivity.

What is relative permittivity?

Two small spheres 18cm apart have equal negative charges and repel each other with the force $6\times {10}^{-8}N$. Find the total charge on two spheres.

A sphere of metal has a radius of $12 \mathrm{cm}$ and carries a charge of $1.6\times {10}^{-7}\mathrm{C}$, distributed uniformly on its surface. Calculate the electric field intensity at a point just outside the sphere. 

A hollow spherical conductor of radius $12 \mathrm{cm}$ is given a charge of $2.4 \times {10}^{-9} C$. Calculate the intensity of electric field in air at a distance of $4 \mathrm{m}$ from the centre of the sphere.

Four charges of $+6\times {10}^{-8}C$ each are placed at the corners of a square whose sides are $3 \mathrm{cm}$, each. Calculate the resultant force on each charge and show direction in a diagram drawn to scale.