Electrostatic MCQ Level - 1 - Class 12 MCQ

In S.I system, the value of e₀ is

Dimensions of e₀ are

The dielectric constant K of an insulator can be :

Choose the correct statement :

There are two charges +1 μC and +5 μC. The ratio ofthe forces (force on one due to other) acting on themwill be

Five balls numbered 1, 2, 3, 4, 5 are suspended usingseparate threads. The balls (1, 2), (2, 4) and (4, 1) showelectrostatic attraction, while balls (2,3) and (4, 5) showrepulsion, Therefore, ball 1 must be

Electric charges A and B repel each other, Electriccharges B and C also repel other. If A and C are heldclose together, they will.

Two point charges repel each other with a force of 100N One of the charges is increased by 10% and theother is reduced by 10%. The new force of repulsion atthe same distance would be

Two positive and equal charges are fixed at a certaindistance. A third small charge is placed in between thetwo charges and it experiences zero net force due tothe other two.

An isolated charge q₁ of mass m is suspended freelyby a thread of lengthi . Another charge q₂ is broughtnear it (r >>i ). When q₁ is in equilibrium, tension inthread will be

A point charge q₁, is moved along a circular path ofradius r in the electric field of another point charge q₂ at the centre of the parh. The work done by the electric field on the charge q₁ in half revolution is

A spherical conducting ball is suspended by a groundedconducting thread. A positive point charge is moved nearthe ball. The ball will

Five point charges, each of value +q, are placed on fivevertices of a regular hexagon of side L. The magnitudeof the force on a point charge of value -q coulomb placedthe centre of the hexagon is

The sure test of electrification is :

The number of electrons in one coulomb of charge willbe :

The minimum value of charge on any charged body maybe :

When 10¹⁴ electrons are removed from a neutral metalsphere, the charge on the sphere becomes

One metallic sphere A is given a positive charge whereasanother metallic sphere B of exactly the same mass isgiven a negative charge. Then

An electron has charge 1.6 × 10^-19 coulomb when atrest. When it moves with speed 0.8c the charge on theelectron would be (c being speed of light in vacuum)

A charged rod attracts bits of dry cork dust which aftertouching the rod

The electrostatic force between two point charges q₁and q₂ at separation r is given by

The constant K

A charge q₁ exerts some force on a second charge q₂.If third charge q₃ is brought near, the force of q₁ exertedon q₂

If F_e and F_g are electric and gravitational force,respectively between two electrons situated at certaindistance apart, then the ratio of F_e and F_g is of the order of

A thin stream of water from a tap is attracted by placing a rod near it. The rod is

The proton is 1836 times heavier than electron. TheCoulomb's force of repulsion between two protons at acertain distance between them is F. Then the Coulombforce between two electrons for same distance wouldbe :

Two point charges at a distance r air exerts a force on each other The value of distance R at which they experience the same force when placed in a medium of dielectric constant is? 

Two neutrons are placed at some distance a part from each other. They will