 
 <prompt> Wetin dem first mention wey dey cause wahala? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Another extreme case of impedance matching dey happen wen dem dey use small loop antenna (usually, but not always, for receiving) for low frequency wey e dey look like pure inductor. Resonating dis kind inductor with capacitor for di frequency of operation no just dey cancel di reactance but e dey greatly magnify di very small radiation resistance of dis kind loop. Dis one dey happen for most AM broadcast receivers, with small ferrite loop antenna wey dem resonate with capacitor wey dey vary along with di receiver tuning so dat e go dey maintain resonance over di AM broadcast band. 