Find the equivalent capacitance for the combination of capacitances shown in fig.25-10a, across which potential difference V is applied . Assume
(a) `C_1=12.0 mu F,C_2=5.30 mu F and C_3=4.50 mu F`
(b) The potential difference applied to the input terminals in fig.25-10a is V=12.5V What is the charge on `C_1`?

Explanation

To solve the problem step by step, we will first find the equivalent capacitance of the circuit and then calculate the charge on capacitor \( C_1 \).

### Step 1: Identify the Configuration of Capacitors
In the given circuit, capacitors \( C_1 \) and \( C_2 \) are in parallel, and their combination is in series with capacitor \( C_3 \).

### Step 2: Calculate the Equivalent Capacitance of \( C_1 \) and \( C_2 \)
For capacitors in parallel, the equivalent capacitance \( C_{12} \) is given by:
\[
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