R2R4的精選

問題詳情：如圖所示，4只電阻串聯於某電路中．已測出UAC=9V，UBD=6V，R2=R4則UAE為（  ）                                                                ...

問題詳情：如圖5所示電路中，已知R1=2Ω，R3=5Ω，R2=R4，電壓表讀數U1=2.4V，U2=4V，則電阻R2為A.10Ω          B.8Ω             C.6Ω             D.4Ω 【回答】A知識點：歐姆定律題型：選...