A.熱傳遞 B.電流的發(fā)熱現(xiàn)象 C.電流的熱效應(yīng) D.熱能
A.0.015mA B.1.5mA C.0.15mA D.15mA
如圖所示,以C為參考點(diǎn),則UAC=()
A.1.5V B.3V C.0 D.2V