Question

Choose the correct statements from the following:
A. The total charge in any isolated system remains constant.
B. When some charge is transferred to a conductor, it stays at the same place without getting distributed over the entire surface.
C. One Coulomb of negative charge is the total charge of \(6.25 \times 10^{18}\) electrons.
D. Electric field is a scalar field.
E. Permanent dipole means that the dipole moment \(\vec{P}\) exists irrespective of external electric field \(\vec{E}\).

• A. B, C, D and E only
• B. A, D and E only
• C. B and D only
• D. A, C and E only

Hint:

Electric field is always a \textbf{vector quantity}, and charges on conductors redistribute across their surface to minimize potential.

Answer 1

The Correct Option is D

Statement A is correct because charge is conserved in an isolated system.
Statement B is incorrect since on a conductor, charge always redistributes over the surface to achieve electrostatic equilibrium.
Statement C is correct; one electron has a charge of \(1.6 \times 10^{-19}\) C, so \(6.25 \times 10^{18}\) electrons sum to approximately 1 C of negative charge.
Statement D is incorrect because electric field is a vector field, not scalar.
Statement E is correct as a permanent dipole has a fixed dipole moment regardless of external field.