A parallel plate capacitor having capacitance 12 pF is charged by a battery to a potential difference of 10 V between its plates. The charging battery is now disconnected and a porcelain slab of dielectric constant 6.5 is slipped between the plates the work done by the capacitor on the slab is : |
|||
(a) |
692 pJ |
(b) |
60 pJ |
(c) |
508 pJ |
(d) |
560 pJ |
A parallel plate capacitor having capacitance 12 pF is charged by a battery to a potential difference of 10 V between its plates. The charging battery is now disconnected and a porcelain slab of dielectric constant 6.5 is slipped between the plates the work done by the capacitor on the slab is : |
|||
(a) |
692 pJ |
(b) |
60 pJ |
(c) |
508 pJ |
(d) |
560 pJ |
Intial energy of capacitor
=
=×
=600J
Since battery is disconnected so charge remain same.
Final energy of capacitor
=
=×
=92
W+ =Ui
W=508 J
Two kg of a monoatomic gas is at a pressure of 4 |
|||
(a) |
103 J |
(b) |
105 J |
(c) |
106 J |
(d) |
104 J |
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