Questions
Find the equivalent capacitance between A and B
.
a
10C5
b
5C7
c
10C7
d
7C10
detailed solution
Correct option is C
q1+q2=q…………..(1)Using KVL, −q1C−q32C+q22C=0⇒q2−q3−2q1=0………(2)Plates inside dotted line form an isolated system.Hence, q2+q3−q1=0………..(3)Solving these equations, we getq1=25q, q2=35q and q3=−q5 Now, let Ceq be the equivalent capacitance between A and B . VA−VB=qCeq=q1C+q22C⇒qCeq=2q5C+3q10C=7q10C⇒Ceq=107CTalk to our academic expert!
Similar Questions
Figure shows two capacitors C1 and C2 connected with 10 V battery and terminal A and B are earthed. The graph shows the variation of potential as one moves from left to right. Then the ratio C1/C2 is
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