Electric Charge

A positively charged glass rod is brought close to a metallic rod isolated from ground. The charge on the side of the metallic rod away from the glass rod will be

All the statements given below are correct :

(A) Repulsion is sure test of electrification
(B) Two likely charged body may attract each other
(C) Electroscope is used to detect charge on object
(D) Electric force between $2$ point charges does not depends on nearer bodies

As shown in the figure, two particles, each of mass $\text{'}m\text{'}$ tied at the ends of a light string of length $2a$ are kept on a frictionless horizontal surface. When the mid point $\left(P\right)$ of the string is pulled vertically upwards with a small but constant force $F,$ the particles move towards each other on the surface. Magnitude of acceleration of each particle, when the separation between them becomes $2x$ is $\frac{F}{2m}\frac{x}{\sqrt{a^2-x^2}}$

When a positively charged body is brought near the metal disc of a neutral electroscope, its leaves -

_____ (Lightning conductor/ Electroscope) is used to detect the presence of charge on an object.

Which device is used to detect the presence of charge on an object - lightning conductor or electroscope?

Gold leaf electroscope works on the principle of charging of a body by _____.

When an uncharged body is brought near a gold leaf electroscope, the leaves open up.

Gold leaf electroscope works on the principle of charging of a body by conduction.

Touching the disc of an electroscope will lead to its discharge.

For two point charges ${\mathrm{q}}_1$ and ${\mathrm{q}}_2$, the product ${\mathrm{q}}_1{\mathrm{q}}_2<0$. What is the nature of the force between them?

Unit of electric charge is _____.

If ${10}^9$ electrons move out of a body to another body every second, then the time required to get a total charge of $1\mathrm{ }\mathrm{C}$ on the other body is

The number of electrons present in $-1\mathrm{ }\mathrm{C}$ of charge is

An object is charged when it has a charge imbalance, which means the

Three charged particles are collinear and are in equilibrium, then

The total positive charge in a glass of water containing $180 \mathrm{g}$ of water is approximately:

Two spheres A and B of exactly same mass are given equal positive and negative charges respectively. Their masses after charging

On charging by conduction, mass of a body may

If a body is positively charged, then it has