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Class 12
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Physics
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Electrostatic Potential and Capacitance
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Energy Stored in Capacitor
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Energy density of the parallel plate cap...
Energy density of the parallel plate capacitor
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REVISE WITH CONCEPTS
Energy Stored in Capacitor - Mathematically
Example
Definitions
Formulaes
>
QUICK SUMMARY WITH STORIES
Energy stored in the capacitor
2 mins
Problem-based on Energy of Capacitor - I
2 mins
Energy Stored in Parallel Plate Capacitor
3 mins
Problem based on Energy stored in Capacitor
3 mins
Energy Density for Capacitor
3 mins
Problem-based on Energy Density for Capacitor - I
2 mins
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Important Questions
Derive an expression for energy stored in a capacitor. In which form energy is stored?
Medium
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A 900 pF capacitor is charged by 100 V battery as shown in figure. The capacitor is disconnected from the battery and connected to another 900 pF capacitor. What is the electrostatic energy stored by the system?
Hard
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The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is :
Hard
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A 12pF capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capacitor?
Medium
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A parallel plate capacitor has a uniform electric field
$E$
in the space between the plates. If the distance between the plates is
$d$
and area of each plate is
$A$
, the energy stored in the capacitor is :
Hard
NEET
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>
A capacitor of capacitance
$10μF$
is charged to
$10V$
. The energy stored in it is
Medium
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A parallel plate capacitor of capacitance C is charged to a potential V. It is then connected to another uncharged capacitor having the same capacitance. Find out the ratio of the energy stored in the combined system to that stored initially in the single capacitor.
Medium
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The plates of a parallel plate capacitor have an area of
$90cm_{2}$
each and are separated by 2.5 mm. The capacitor is charged by connecting it to a 400 V supply.
(a) How much electrostatic energy is stored by the capacitor?
(b)
View this energy as stored in the electrostatic field between the plates, and obtain the energy per unit volume u. Hence arrive at a relation between u and the magnitude of electric field E between the plates.
Hard
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A capacitor of capacitance
$C$
is initially charged to a potential difference of
$V$
volt. Now it is connected to a battery of
$2V$
volt with opposite polarity. The ratio of heat generated to the final energy stored in the capacitor will be :
Medium
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Energy stored in a capacitor and dissipated during charging a capacitor bear a ratio:
Medium
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>