Four plates each of area A are connected to the terminals of a battery of emf ‘V’. Then charge on plate 2 is
2ε0Avd
ε0Avd
23ε0Avd
ε0Av3d
C=ε0Ad Q = charge on eachcapacitor =CV=ε0AVd ∴ Charge on Plate (2)=2Q=2ε0AVd