Electric Charge...

The force of interaction (attraction or repulsion) between two stationary point charges in vacuum is directly proportional to the product of the charges and inversely proportional to the square of distance between them. This is called_______

If the electric field is given by $$(5i+4j+9k)$$, the electric flux through a surface of area $$20$$ unit lying in the Y-Z plane will be :

The force of interaction (attraction or repulsion) between two stationary point charges in vacuum is _____

Two charges are placed in vacuum at a distance 'd' apart. The force between them is 'F'. If a medium of dielectric constant $$4$$ is introduced between them, the force will be:

Two spheres carrying charges $$+ 6\mu C$$ and $$+ 9\mu C$$ separated by a distance $$d$$, experiences a force of repulsion $$F$$. When a charge of $$- 3\mu C$$ is given to both the sphere and kept at the same distance as before, the new force of repulsion is :

Two point charges having equal charges separated by $$1 m$$ distance experience a force of $$8 N$$. What will be the force experienced by them, if they are held in water, at the same distance? 
(Given, $$K_{water} = 80$$ ) 

Coulomb's Law agrees with________

The sum of two point charges is $$7 \mu C$$. They repel each other with a force of $$1 N$$ when kept $$30 cm$$ apart in free space. Calculate the value of each charge.

Coulomb's law is a confirmation of______

Charges of $$1 \mu C$$ and $$10\mu C$$ are placed and held $$0.1m$$ apart. What will be the force they exert on each other?