Q.
Two capacitors A and B are connected in series with a battery as shown in fig. When the switch S is closed and the capacitors get charged fully, then
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a
the p.d. across the plates of A is 4 V and across the plates of B is 4 V
b
the p.d. across the plates of A is 6 V and across the plates of I is 4 V
c
the ratio of electrical energies stored in A and B is 2:3
d
the ratio of charges on A and B is 3 : 2
answer is B.
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Detailed Solution
The two capacitors are connected in series. The equivalent capacitance C is given by1C=1C1+1C2=12+13=56C=6/5μFCharge on each capacitor =6 / 5 x 10 = 12 coulomb.Potential diff. across A=122=6 volt Potential diff. across B=123=4 volt
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