Electrostatics Question 271
Question: given below shows two identical parallel plate capacitors connected to a battery with switch closed. The switch is now opened and the free space between the plate of capacitors is filled with a dielectric of dielectric constant 3. What will be the ratio of total electrostatic energy stored in both capacitors before and after the introduction of the dielectric [IIT 1983]
Options:
A) 40
B) 32
C) 8
D) 2
Show Answer
Answer:
Correct Answer: B
Solution:
Suppose
Suppose m rows of given capacitors are connected in parallel and each row contains n capacitors then potential difference across each capacitor
and equivalent capacitance of network
Short Trick : For such type of problems number of capacitors =