रेडियो ट्यूनिंग
Turning a radio dial is really adjusting a capacitor, and this simulation makes that visible. Several stations broadcast at once; as you tune the LC circuit, only the station whose frequency matches the circuit's natural frequency comes through clearly while the others fade into the background.
इस सिमुलेशन का उपयोग कैसे करें
- Turn the tuning dial to vary the capacitance
- Change the inductance of the coil
- Switch between the available broadcast stations
क्या देखें
- Signal strength peaks sharply as you sweep through each station's frequency
- Stations close together in frequency are harder to separate
- The resonance peak broadens as resistance increases, making tuning less selective
इसके पीछे की भौतिकी
A resonant LC circuit responds strongly only to signals near its natural frequency f = 1/(2π√(LC)). At resonance the circuit's impedance to that frequency is minimised, so that station's signal drives a large current while off-resonance signals barely register. Selectivity — how sharply the circuit rejects neighbours — depends on the circuit's resistance.