Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: A cikin kayan lantarki, riba shine ma'auni na iyawar kewayon tashar tashar jiragen ruwa guda biyu (sau da yawa mai kara karfi) don ƙara iko ko faɗakarwar siginar daga shigarwa zuwa tashar fitarwa ta ƙara kuzari da aka canza daga wasu wutar lantarki zuwa siginar. An bayyana shi azaman matsakaicin rabo na ƙarfin sigina ko iko a tashar fitarwa zuwa ƙarfin sigina ko iko a tashar shigarwa. Sau da yawa ana bayyana ta amfani da logarithmic decibel (dB) raka'a ("dB gain"). A gain mafi girma fiye da daya (mafi girma fiye da sifili dB), cewa shi ne karfafawa, shi ne defining dukiya da wani aiki bangaren ko kewaye, yayin da m kewaye za su yi wani gain na kasa da daya. The lokaci gain kadai ne m, kuma zai iya koma zuwa rabo daga fitarwa zuwa shigar da ƙarfin lantarki (ƙarfin lantarki gain), halin yanzu (yanzu gain) ko lantarki da iko (iko gain). A fagen sauti da na'urorin kara karfin sauti, musamman na'urorin kara karfin aiki, kalmar yawanci tana nufin karuwar karfin wuta, amma a cikin na'urorin kara karfin rediyo yawanci yana nufin karuwar iko. Bugu da ƙari, ana amfani da kalmar samun nasara a cikin tsarin kamar na'urori masu auna sigina inda shigarwa da fitarwa suna da raka'a daban-daban; a irin waɗannan lokuta dole ne a ƙayyade raka'a samun nasara, kamar a "5 microvolts da photon" don amsawar mai daukar hoto. "Samun" na bipolar transistor yawanci yana nufin ci gaba da halin yanzu canja wurin rabo, ko dai hFE ("beta", da static rabo daga Ic raba da Ib a wasu aiki batu), ko wani lokacin hfe (da kananan-siginar halin yanzu riba, da gangara na hoto na Ic da Ib a wani batu).  Tambaya: Menene hFE yake nufi?
"beta", yanayin yanayin Ic da aka raba da Ib a wani wuri na aiki