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JEE Advanced Model Paper 15 with solutions for online practice
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© examsnet.com
Question : 7
Total: 60
The diagram shows two concentric shells at the potentials as shown. The radius of the outershell is R and the radius of the inner shell is R/2. What is the amount of heat generated on closing the switch ?
2
π
ε
0
R
(
V
)
2
4
π
ε
0
R
(
V
)
2
8
π
ε
0
R
(
V
)
2
π
ε
0
R
(
V
)
2
Validate
Solution:
The energy stored between the shell remains unchanged so heat generated is
H =
1
24
π
ε
0
R
(
V
)
2
(Energy between outer shell and infinity)
=
2
π
ε
0
R
V
2
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