Physics Electrostatics Test Online MCQs

1. How many electrons make up a charge of 20μC.

2. The point charges Q and – 2Q are placed at some distance apart. If the electric field at the location of Q is E. The electric field at the location of Q is E. The electric field at the location of -2Q will be

3. Five capacitors, each of capacitance value C are connected as shown in the figure. The ratio of capacitance between P & R, and the capacitance between P & Q is:

4. A particle of mass 2g and charge 1μC is held at a distance of 1m from a fixed charge 1mC. If the particle is released it will be repelled. The speed of particle when it is at a distance of 10 meter from the fixed charge is:

5. A condenser of capacitor 50μF is charged to 10 volt. The energy stored is:

6. The spatial distribution of the electric field due to two charges (A, B) is shown in figure. Which one of the following statements is correct?

7. Two materials having the dielectric constants K₁ and K₂ are filled between two parallel plates of a capacitor, which is shown in figure. The capacity of the capacitor is:  

8. A hollow cylinder has charge q C within it. If ф is the electric flux in unit of voltmeter associated with the curved surface B, the flux linked with the plane surface A in unit of voltmeter will be:

9. Two infinitely long parallel conducting plates having surface charge densities +σ and –σ respectively, are separated by a small distance. The medium between respectively, are separated by a small distance. The medium between the plates is vacuum. If  ε₀ is the dielectric permittivity of vacuum then the electric field in the region between the plates is:

10. An electron of mass m and charge e is accelerated from rest through a potential difference v in vacuum. The final speed will be:

11. Equipotential surfaces associated with an electric field which is increasing in magnitude along the x-direction are:

12. what is the electric flux associated with one of faces of a cube, when a charge (q) is enclosed in the cube?

13. If the separation between the plates of a capacitor is 5 mm, then the area of the plate of a 3F parallel plate capacitor is:

14. An electric dipole placed in a non-uniform electric field experiences:

15. A circle of radius R is drawn with charge + q at the center. A charge q₀ is brought from point B to C, then work done is