Dielectrics
Identify the correct statements:
A. Effective capacitance of a series combination of capacitors is always smaller than the smallest capacitance of the capacitor in the combination.
B. When a dielectric medium is placed between the charged plates of a capacitor, displacement of charges cannot occur due to insulation property of dielectric.
C. Increasing of area of capacitor plate or decreasing of thickness of dielectric is an alternate method to increase the capacitance.
D. For a point charge, concentric spherical shells centered at the location of the charge are equipotential surfaces.
Choose the correct answer from the options given below:
Show answer and solution
Answer: (a)
- A: true; in series for every , so is less than the smallest.
- B: false; the dielectric gets polarised, i.e. bound charges are displaced slightly.
- C: true; grows with larger or smaller .
- D: true; is constant on any sphere centred on the charge.
- So A, C and D are correct: answer (a).