Another extreme case of impedance matching occurs when using a small loop antenna (usually, but not always, for receiving) at a relatively low frequency where it appears almost as a pure inductor. Resonating such an inductor with a capacitor at the frequency of operation not only cancels the reactance but greatly magnifies the very small radiation resistance of such a loop.[citation needed] This is implemented in most AM broadcast receivers, with a small ferrite loop antenna resonated by a capacitor which is varied along with the receiver tuning in order to maintain resonance over the AM broadcast band COUNT 4
QSN1 What magnifies the small radiation resistance of a loop? ANS1 a capacitor at the frequency of operation QSN2 What is resonated by a capacitor along with the receiver tuning that maintains resonance over the AM broadcast band? ANS2 small ferrite loop antenna QSN3 What is used in most AM broadcaster receivers? ANS3 loop QSN4 When using a small loop antenna at a low frequency, what may occur? ANS4 impedance matching