Physics - Capacitor Question with Solution | TestHub
Two condensers of capacities, '2C' and 'C' are joined in parallel and charged upto potential 'V'. The battery is then disconnected and condenser of capacity 'C' is filled completely with a medium of dielectric constant 'K'. The potential difference across the capacitors in the second case is
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Answer:
Solution:
Initial equivalent capacitance of the parallel combination is .
Total charge stored in the capacitors when charged to potential is .
When the battery is disconnected, the total charge remains conserved.
The capacitor of capacity is filled with a dielectric of constant , so its new capacitance becomes .
The new equivalent capacitance of the parallel combination is .
The new potential difference across the capacitors is given by .
Substituting the values, .
Answer:
