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Standard XII
Physics
Effects of Dielectrics in Capacitors
Question

A parallel plate capacitor of capacitance $$10 \mu F$$ is connected to a cell of e.m.f. 10 V and is fully charges. Now a dielectric slab (k = 3) of thickness equal to the gap between the plates is completely filled in the gap, keeping the cell connected. During the filings process,

A
the heat produced is zero
B
the increase in charge on the capacitor is $$200 \mu C$$
C
energy supplied by the cell = increase in stored potential energy + work done on the person who is filling the dielectric slab
D
energy supplied by the cell = increase in stored potential energy + work done on the person who is filling the dielectric slab + heat produced
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Solution
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Correct option is C. energy supplied by the cell = increase in stored potential energy + work done on the person who is filling the dielectric slab

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