Hots Questions

## Electric Charges And Fields

- Want to initiate thinking skills? Practice Higher Order Thinking Questions
1
You have given two charges, each charge have different patterns of field lines. With this information, can you say about magnitude and nature of charges?

Figure shows lines of force for a system of two point charges. The possible choice for the charges is:

A
B
C
D
2
Do you know, Flux linkage with the surface or field lines crossing the surface, both have same meaning? Let's practice number of field lines linked with a surface in different field strength.

In a region where intensity of electric field is  , lines of electric force are crossing per square metre. The number of lines crossing per square metre where intensity of electric field is  will be :

A
B
C
D
3
Dipoles don't experience any force in uniform electric field, but all types of rotation equilibrium possible in it (Stable equilibrium and unstable equilibrium). Think on motion of dipole when it is displaced with small angle from position of stable equilibrium.
An electric dipole is formed by two particles fixed at the ends of a light rigid rod of length . The mass of each particle is m and charges are and . The system is suspended by a torsionless thread in an electric field of intensity such that the dipole axis is parallel to the field. If it is slightly displaced, the period of angular motion is :
A
B
C
D
4
Assume one charged rod is placed near a neutral conducting rod. What will happen in the conducting rod? Will positive and negative charges separated? Think on flux trough the surface that inclosing these two rods.
Charge on an originally uncharged conductor is separated by holding a positively charged rod very closely nearly, as in Fig. Assume that the induced negative charge on the conductor is equal to the positive charge on the rod. Then, flux through surface is
A
Zero
B
C
D
None of these
5
Electric flux is nothing but number of field lines coming from charged objects. Numbers of these lines can be calculated by gauss's law. But when you completely closing this charge with any shape of a closed surface, all field lines must cross that surface at any possible points. so flux linked will be same for all possible types of closed surface. Let's think on it and practice given question.
An infinite, uniformly charged sheet with surface charge density cuts through a spherical Gaussian surface of radius R at a distance x from its center, as shown in the figure. The electric flux through the Gaussian surface is :
A
B
C
D
6
A charge located at the center of the charged ring of opposite nature will be in stable equilibrium. Can charge oscillate about center of ring after small displacement along the axis? Analise this situation through this question.

A thin fixed ring of radius has a positive charge uniformly distributed over it. A particle of mass having a negative charge of is placed on the axis at a distance of from the centre of the ring. Assuming that the oscillations has small amplitude, the time period of oscillations is:

A
B
C
D
7
A point charge 'Q' is kept at center of one face of regular pyramid. In this case, pyramid will not completely enclose charge. So what will you do to calculate flux through any others face of pyramid? let's think about it and review your concept with this question.
A point of charge is positioned at the centre of the base of a square pyramid as shown. The flux through one of the four identical upper faces of the pyramid is :-
A
B
C
D
None of these