Two identical parallel plate capacitors are connected in series and then joined in series with a battery of 100V. A slab of dielectric constant K=3 is inserted between the plates of the first capacitor. Then, the potential difference across the capacitors will be respectively,
50V,50V
$20V, 780
75V,25V
25V,75V
A
$20V, 780
B
25V,75V
C
50V,50V
D
75V,25V
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Solution
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After inserting a dielectric plate C1=3CandC2=C V1=C×V3C+C=C×1004C=25V,V2=100−25=75V
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