Physics

Problem

A tuning capacitor can be varied from

40\,\text{pF}

400\,\text{pF}

. What approximate inductance should the coil have so that the circuit can cover the entire AM broadcast band from

530\,\text{kHz}

1700\,\text{kHz}

? (Assume coverage is achieved when the lowest frequency corresponds to the maximum capacitance.) a)

0.093\,\text{mH}

2.3\,\text{mH}

0.226\,\text{mH}

0.022\,\text{mH}