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Class 12
Physics
Electrostatic Potential and Capacitance
a 600 pf capacitor is charged by a 200 v supply i...

Question:
A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is connected to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process?

Answer:

Capacitance of the capacitor, C = 600 pF

Potential difference, V = 200 V

Electrostatic energy stored in the capacitor is given by,

If supply is disconnected from the capacitor and another capacitor of capacitance C = 600 pF is connected to it, then equivalent capacitance (C^') of the combination is given by,

New electrostatic energy can be calculated as

Loss in electrostatic enegy = E - E'

= 1.2 x 10^-5 - 0.6 x 10^-5

= 0.6 x 10^-5

= 6 x 10^-6 J

Therefore, the electrostatic energy lost in the process is 6 x 10^-6 J.

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Question:
A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is connected to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process?

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Question: A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is connected to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process?

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Question:
A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is connected to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process?