Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Capacitance/
Question 31570
JEE Physics · Hard

Capacitance: Dielectric Removed at Constant V MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Dielectric Removed at Constant VHardQuestion 31570

Question

A capacitor is charged to V by a battery (battery remains connected). The dielectric is then removed. What happens to charge Q?
  1. A
    Q increases
  2. B
    Q decreases
    Correct
  3. C
    Q stays same
  4. D
    Q becomes zero

Correct answer

Q decreases

Explanation

V is fixed by battery. Removing dielectric reduces C (K→1). Since Q = CV and V constant, Q decreases. Excess charge returns to battery.

Review Capacitance notesStart timed chapter practice