A level Electrostatics Quiz 2

16 Questions

Quiz Description

Electrostatics, the study of charges in motion, is a very important branch of Physics that has proven very useful as the knowledge of this topic has led to the development of inkjet printers, laser printers, photocopiers, and even electrostatic air filters. In this quiz, we will be seeing some laws concerning electrostatics formulated by great Physicists like Coulomb and Gauss. 

Electrostatics is the study of electric fields in static equilibrium. The study of electromagnetic phenomena that occurs when charges are in motion is also called electrostatics. As seen in quiz one, force is simply the attraction or repulsion between charges of opposite signs and is defined by Coulomb’s law of electrostatics which you will see along the way. But this force varies with 2 factors, the number of charges and the distance separating the charges. The higher the charges the larger the force and the longer the distance separating the charges, the smaller the force.

We know this is still just a summary of this broad topic. You will find more interesting things along the way which you will learn. You will find more quizzes on other subjects here. Take the quiz and see how well you are familiar with electrostatics.

Best of Luck

1:

The surface considered for Gauss’s law is called


Correct
  • 1:
    Gaussian surface
  • 2:
    Plane surface
  • 3:
    Spherical surface
  • 4:
    Closed surface
2:

Electric field lines provide information about


Correct
  • 1:
    field strength
  • 2:
    direction
  • 3:
    nature of charge
  • 4:
    all of these
3:

The force per unit charge is known as


Correct
  • 1:
    electric flux
  • 2:
    electric field
  • 3:
    electric potential
  • 4:
    electric current
4:

Gauss’s law will be invalid if


Correct
  • 1:
    there is magnetic monopole.
  • 2:
    the inverse square law is not exactly true.
  • 3:
    the velocity of light is not a universal constant.
  • 4:
    none of these.
5:

The magnitude of electric field intensity E is such that, an electron placed in it would experience an electrical force equal to its weight is given by


Correct
  • 1:
    mge
  • 2:
    mg/e
  • 3:
    e/mg
  • 4:
    e²g/m²
6:

The electric field inside a spherical shell of uniform surface charge density is


Correct
  • 1:
    zero.
  • 2:
    constant, less than zero.
  • 3:
    directly proportional to the distance from the centre.
  • 4:
    none of the these
7:

Two charges of equal magnitudes kept at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled, then the new force acting on each charge is


Correct
  • 1:
    F/8
  • 2:
    F/4
  • 3:
    4F
  • 4:
    F/16
8:

A charge Q is divided into two parts of q and Q – q. If the coulomb repulsion between them when they are separated is to be maximum, the ratio of Q/q should be


Correct
  • 1:
    2:1
  • 2:
    1/2
  • 3:
    4:1
  • 4:
    1/4
9:

Two similar spheres having +Q and -Q charges are kept at a certain distance. F force acts between the two. If at the middle of two spheres, another similar sphere having +Q charge is kept, then it experiences a force in magnitude and direction as


Correct
  • 1:
    zero having no direction.
  • 2:
    8F towards +Q charge.
  • 3:
    8F towards -Q charge.
  • 4:
    4F towards +Q charge.
10:

Two charges q1 and q2 are placed in vacuum at a distance d and the force acting between them is F. If a medium of dielectric constant 4 is introduced around them, the force now will be


Correct
  • 1:
    F
  • 2:
    F/4
  • 3:
    F/4
  • 4:
    4F
11:

 In general, metallic ropes are suspended on the carriers taking inflammable materials. The reason is


Correct
  • 1:
    to control the speed of the carrier.
  • 2:
    to keep the body of the carrier in contact with the earth.
  • 3:
    to keep the body of the carrier in contact with the earth.
  • 4:
    none of these.
12:

When a glass rod is rubbed with silk, it


Correct
  • 1:
    gains electrons from silk.
  • 2:
    gives electrons to silk.
  • 3:
    gives protons to silk.
  • 4:
    gains protons from silk.
13:

Coulomb’s law is true for


Correct
  • 1:
    atomic distances (= 10^–11 m)
  • 2:
    nuclear distances (= 10^–15 m)
  • 3:
    charged as well as uncharged particles
  • 4:
    all the distances
14:

100 joule of work is performed in carrying a charge of ‒5 coulomb from infinity to a particular point in a uniform electrostatic field. The potential of this point is:


Correct
  • 1:
    100 V
  • 2:
    5 V
  • 3:
    -20V
  • 4:
    20 V
15:

Three different capacitors are connected in series. Then:


Correct
  • 1:
    They will have equal charges
  • 2:
    They will have same potential
  • 3:
    Both A & B
  • 4:
    None of these
16:

If Q is the charge on the capacitor and E is the electric field intensity between the plates, then the force between the plates of a capacitor is


Correct
  • 1:
    QE
  • 2:
    2QE
  • 3:
    QE/2
  • 4:
    QE/4

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A level Electrostatics Quiz 2
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