Electrostatics deals with the study of forces, fields, and potential arising from static charges. Which of the following statements are correct? Choose the correct answer from the options given below:
(A), (C), and (D) only
The correct statements are:
- (A) Electrostatic force is a conservative force, meaning the work done by the electrostatic force in moving a charge between two points depends only on the initial and final positions and not on the path taken.
- (C) In a uniform electric field, an electric dipole experiences a torque but no net force, because the forces on its two opposite charges cancel out.
- (D) Electric field lines start from positive charges and end at negative charges. If an isolated charge exists, field lines may start or end at infinity.
Statement (B) is also correct since charge is quantized in integral multiples of the electron’s charge.
Thus, the correct answer is (b) (A), (C), and (D) only.
Important Questions from Electric Charges and Fields
Which of the following options is correct by using Coulomb's law?
Which of the following statements are correct?
- A. The angle at minimum deviation of a prism is greater for violet light than that for red light.
- B. The purpose of microscopes and telescopes is to increase the visual angle.
- C. For the diffraction to take place, the size of aperture or of the obstacle should be comparable to the wavelength of light.
- D. The light scattered in the direction of the incident light is always plane polarized.
- E. The source and its virtual image can behave as coherent sources.
Choose the correct answer from the options given below:
Match List - I with List - II
Choose the correct answer from the options given below:
A thin metallic spherical shell contains a charge +10 μC on it. A point charge +2 μC is placed at the centre of the shell and another charge +5 μC is placed outside it as shown. The force on the charge +2 μC at the centre is:
In the figure, an α-particle moves a distance l in a uniform electric field E as shown. Does the Electric Field do a positive or a negative work on the α-particle? Does the electric potential energy of the α-particle increase or decrease?
