MCQ
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
  • C
    Force between plates of capacitor $C$ decreases
  • Magnitude of change of charge on $B$ and $C$ is same

Answer

Correct option: D.
Magnitude of change of charge on $B$ and $C$ is same
d

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