Radio receiver resonant circuit

The NMR experiment consists of inducing transitions between the states of quantized magnetization. This is accompHshed by irradiating the sample with radio frequency (rf) energy. The frequency of the rf must exactly match the precession frequency of the nuclei in order to cause the transition. This specificity is the resonance phenomenon, analogous to the tuned circuit in a radio receiver. The tuned receiver (the spin system composed of a specific nuclear isotope) is only capable of interacting with the broadcast signal whose frequency matches the Larmor frequency of the nuclei. 

Resonant circuits are often used as filters. The parallel type can be used to short out everything except one particular frequency, and it is often used this way in radio receivers and transmitters. In the series type, if the inductor is the... 

---