Question

Five identical plates are arranged such that each pair is a capacitor of capacitance 2 mF.
The plates are connected to a source of emf 10 V as shown. The charge on the plate C is

• A. + 20 mC
• B. + 40 mC
• C. + 60 mC
• D. + 80 mC

Answer 1

The correct option is B + 40 mC

The equivalent circuit diagram,

Since C = 2mF
Charge an reach capacitors is
q= CV
$=2\times {10}^{-3}\times 10$
= 20 mC
Plate C participates in two capacitors. Thus, the charge an it is 40 mC