Physics Electrostatics Test Online MCQs

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

2. Charge q is uniformly distributed over a thin half ring of radius R. The electric field at the center of the ring is

3. Two parallel large thin metal sheets have equal surface charge densities (σ = 26.4 x 10⁻¹² c/m²) of opposite signs. The electric field between these sheets is:

4. 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:

5. A 40 μF capacitor in a defibrillator is charged to 3000 V. The energy stored in the capacitor is set through the patient during a pulse of duration 2 ms. The power delivered to the patient is:

6. A body can be negatively charged by:

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

9. Three point charges +q, -2q and + q are placed at point (x = 0, y = a, z = 0), (x = 0, y = 0, z = 0) and (x = a, y = 0, z = 0) respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are

10. 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:

11. 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:

12. An insulated charged sphere of radius 5 cm gas a potential of 10 V at the surface. The potential at the center will be:

13. The capacitors C₁, C₃, C₄, C₅ have a capacitance 4μF each and C₂ has capacitance 10μF. The effective capacitance between P and Q will be:

14. The number of electrons for one coulomb of charge are:

15. In the basic CsCI crystal structure, Cs⁺ and CI⁻ ions are arranged in a bcc configuration as shown in the figure. The net electrostatic force exerted by the eight Cs⁺ ions on the CI⁻ ion is: