A parallel plate capacitor with plate separation 5 mm is charged by a battery. On introducing a mica sheet of 2 mm and maintaining the connections of the plates with the terminals of the battery, it is found that it draws 
more charge from the battery. The dielectric constant of mica is 
.
Text Solution
Verified by ExpertsC
Initial capacitor has plate separation 5 mm with capacitance 
.
After inserting 2 mm mica sheet, the gap remaining is 3 mm of air. The effective separation becomes:
where 
is the dielectric constant of mica.
New capacitance: 
Since battery remains connected, voltage is constant. The charge is: 
Ratio of charges: 
Given that charge increases by 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems