Three capacitors $A,B$ and $C$ are connected with battery $emf\, \varepsilon $. All capacitors are identical initially. If dielectric slab is inserted between plates of capacitor $A$ slowy with help of external force then
A
Chemical energy of battery remains unchanged
B
Positive work is done on the given system by external force
CForce between plates of capacitor $C$ decreases
DMagnitude of change of charge on $B$ and $C$ is same
Medium
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DMagnitude of change of charge on $B$ and $C$ is same
d
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