A coil of inductance 0.4 mH is connected to a capacitor of capacitance 400 pF. To what wavelength is this circuit tuned ?

Explanation

To solve the problem of finding the wavelength to which the circuit is tuned, we will follow these steps:

### Step 1: Convert the given inductance and capacitance to standard units.
- Inductance \( L = 0.4 \, \text{mH} = 0.4 \times 10^{-3} \, \text{H} \)
- Capacitance \( C = 400 \, \text{pF} = 400 \times 10^{-12} \, \text{F} \)

### Step 2: Use the formula for the resonant frequency of an LC circuit.
The resonant frequency \( f \) of an LC circuit is given by the formula:
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