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shefali sharma Grade: 12


3 capacitor having capacitance 8.4,8.2and 4.2microfard are connected in series across a 36V potential difference.

(A)what is total energy stored in all 3 capacitor?

(B)the capacitors are connected from potential difference without allowing them to discharge.they are reconnected in parallel with each other,with positively charged plates connected together. what is voltage across each capacitor in parallel combination?

please give the whole solution.

8 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points

Dear shefali

capacitors are connected in series

so equivalent capacitance    1/C =1/C1 + 1/C2 + 1/C3

                                             =1/8.4  + 1/8.2 + 1/4.2

                                   C = 2.087 μF

 so Total energy stored U = 1/2 C V2

                                    = 1352.37  μJ

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8 years ago
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