Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm The outer sphere is earthed and the inner sphere is given a charge of 2 5 mu C Compare the capacitance of this capacitor with that of an isolated sphere of

2.30 A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. The outer sphere is earthed and the inner sphere is given a charge of 2.5 \muC. The space between the concentric spheres is filled with a liquid of dielectric constant 32.

(c) Compare the capacitance of this capacitor with that of an isolated sphere of radius 12 cm. Explain why the latter is much smaller.

Answers (1)

best_answer

The radius of the isolated sphere r = 4.5*10^2

Now, capacitance of sphere:

C_{new}=4\pi\epsilon _0r=4\pi 8.85*10^{-12}*12*10^{-12}=1.33*10^{-11}F

On comparing it with the concentric sphere, it is evident that it has less capacitance. This is due to the fact that the concentric sphere is connected to the earth.

Hence, the potential difference is less and capacitance is greater than in the isolated sphere.  

Posted by

Pankaj Sanodiya

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

PM Modi's Pariksha Pe Charcha 2025 to be held next month, registrations open till January 14
anam-khan

CBSE Board Exams 2025: Online portal for availing exemptions by CWSN students opens
anam-khan

Board Exams: States agree to equivalence; no question paper ‘jumbling’ from next year, says PARAKH CEO

Latest Question