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Byju's Answer
Standard XII
Physics
Idea behind a PPC
What is a cap...
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What is a capacitor?Does it store charge?
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Q.
A device to store electrical charge is called :
Q.
A capacitance of a charged capacitor is C and the energy stored in it is U . What is the value of charge on the capacitor ?
Q.
A capacitor of unknown capacitance is connected across a battery of V volts . The charge stored in it is
360
μ
C
. When potential across the capacitor is reduced by 120 V, the charge stored in it becomes
120
μ
C
.
Calculate:
(i) The potential V and the unknown capacitance C.
(ii) What will be the charge stored in the capacitor, if the voltage applied had increased by 120 V?
Q.
A capacitor of capacitance
C
has charge
Q
and resultant energy stored in it is
W
. If the charge on its plates is increased to
2
Q
, the stored energy would be
Q.
A dielectric is inserted into a capacitor while the charge on it is kept constant. What happens to the potential difference and the stored energy?
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