Three capacitors each of capacitance 9 pF are connected in series. What is the total capacitance of the combination ?

Explanation

To find the total capacitance of three capacitors connected in series, we can follow these steps:

### Step-by-step Solution:

1. **Identify the capacitance of each capacitor**:
Each capacitor has a capacitance of \( C_1 = C_2 = C_3 = 9 \, \text{pF} \).

2. **Use the formula for total capacitance in series**:
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