Physics Electrostatics Test Online MCQs

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

2. 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:

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

4. A body can be negatively charged by:

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

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

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

8. A parallel plate air capacitor has a capacitance C. When it is half filled with a dielectric of dielectric constant 5, the percentage increase in the capacitance will be

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

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

11. 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

12. Minimum number of 8μF and 250 V capacitors are used to make a combination of 16μF and 100 V are:

13. 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:

14. 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

15. 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: