Q41 (2024)
Which of the following statements are correct?
A. Inside a conductor, the electrostatic field is zero.
B. Electric field at the surface of a charged conductor does not depend on its surface charge density.
C. The interior of a charged conductor can have no excess charge in the static situation.
D. At the surface of a charged conductor, the electrostatic field must be normal to the surface at every point.
E. The electrostatic potential is zero everywhere inside a charged conductor.
Choose the correct answer from the options given below:
- C, D and E only
- A, B and D only
- A, C and D only
- A, C and E only
### Related Formula
$$E_{\text{surface}} = \frac{\sigma}{\varepsilon_0}$$
$$V_{\text{inside}} = \text{constant}$$
### Core Logic
A. Electrostatic field is zero inside a conductor (True).
B. Surface electric field is $E = \frac{\sigma}{\varepsilon_0}$ which depends on $\sigma$ (False).
C. Excess charge resides on the outer surface in static equilibrium (True).
D. Electric field is always perpendicular to conductor surface at equilibrium (True).
E. Electrostatic potential is constant (not necessarily zero) inside conductor (False).
Hence, statements A, C, and D are correct.
### Pattern Recognition
Key electrostatics rules for conductors in electrostatic equilibrium.
### Evaluation Rubric / Model Answer
null
### Chapter Mix
Class 12 Physics: Electrostatics
