- #1

Coderhk

- 59

- 2

## Homework Statement

Find the energy in the 2uf capacitor in the diagram attached in uploads.

## Homework Equations

E=(1/2)CV^2

E=QV

C=Q/V

Capacitor in series : 1/(Equivalent Capacitor) =Σ1/(Ci)*

Capacitor in parallel: Equivalent Capacitor =∑Ci*

*i is the index of summation

## The Attempt at a Solution

Attached in uploads, but here's a summary of what I did.

First we find the equivalent capacitance of 2.55micro farads

using Q=CV I get net charge is 1.533E-5 Coulombs

Knowing voltage drop of 1uf, find charge

**Then the charge on 1.55uf is total charge minus charge on 1uf.**

Afterwards I revert back to second diagram and all capacitor in series have same charge.

Find V at 2uf

Plug in E= QV

Done.[/B]

**Textbook answer is 2.2E-7 J**

#### Attachments

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