Answer :

Given


Capacitance of the C1 capacitor = 20μF


Capacitance of the C2 capacitor = 30μF


Capacitance of the C3 capacitor = 40μF


All the Capacitors are connected in series.



Formula used :


Equalent capacitance is







Capacitors are connected in series, so the charge on each of them is the same .


Formula used:


Charge can be calculated as



Where


Q is the charge on the capacitor


Ceq is the equivalent Capacitance


V is the voltage




Work done by the battery is



Where


W is the work done by the battery


Q is the charge on the capacitor


V is the voltage across the end of the capacitor




Charge on capacitors 20μF, 30μF and 40μF are 110.76μC.


Work is done by the battery W


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