A capacitor, a resistor and a 40 mH inductor are connected in series to an a.c. source of frequency 60 Hz. Calculate the capacitance of the capacitor,if current is in phase with the voltage.

Explanation

To solve the problem of finding the capacitance of a capacitor in a series circuit with a resistor and an inductor, where the current is in phase with the voltage, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values:**
- Inductance \( L = 40 \, \text{mH} = 40 \times 10^{-3} \, \text{H} \)
- Frequency \( f = 60 \, \text{Hz} \)
- Phase angle \( \phi = 0 \) degrees (since current is in phase with voltage).
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