Electrostatic MCQ (With Solution)Level - 1 : Test 2 - Class 12 MCQ

In S.I system, the value of is

Dimensions of are

The dielectric constant K of an insulator can be :

Choose the correct statement :

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

There are two charges +1 µC and +5 µC. The ratio of the forces (force on one due to other) acting on them will be

Five balls numbered 1, 2, 3, 4, 5 are suspended using separate threads. The balls (1, 2), (2, 4) and (4, 1) show electrostatic attraction, while balls (2,3) and (4, 5) show repulsion, Therefore, ball 1 must be

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

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

Two positive and equal charges are fixed at a certain distance. A third small charge is placed in between the two charges and it experiences zero net force due to the other two.

An isolated charge q₁ of mass m is suspended freely by a thread of length l. Another charge q₂ is brought near it (r>> l). W hen q1 is in equilibrium, tension in thread will be

A point charge q₁, is moved along a circular path of radius 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 grounded conducting thread. A positive point charge is moved near the ball. The ball will

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

The sure test of electrification is :

The number of electrons in one coulomb of charge will be :

The minimum value of charge on any charged body may be :

W hen 10¹⁴ electrons are removed from a neutral metal sphere, the charge on the sphere becomes

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

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

A charged rod attracts bits of dry cork dust which after touching the rod

The electrostatic force between two point charges q₁ and 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 exerted on q₂

If F_e and F_g are electric and gravitational force, respectively between two electrons situated at certain distance 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. The Coulomb's force of repulsion between two protons at a certain distance between them is F. Then the Coulomb force between two electrons for same distance would be :

The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be