題目列表(包括答案和解析)
圖為X射線管的結(jié)構(gòu)示意圖,E為燈絲電源.要使射線管發(fā)出X射線,須在K、A兩電極間加上幾萬伏的直流高壓( )
A.高壓電源正極應(yīng)接在P點(diǎn),X射線從K極發(fā)出
B.高壓電源正極應(yīng)接在P點(diǎn),X射線從A極發(fā)出
C.高壓電源正極應(yīng)接在Q點(diǎn),X射線從K極發(fā)出
D.高壓電源正極應(yīng)接在Q點(diǎn),X射線從A極發(fā)出
A.高壓電源正極應(yīng)接在P點(diǎn),X射線從K極發(fā)出
B.高壓電源正極應(yīng)接在P點(diǎn),X射線從A極發(fā)出
C.高壓電源正極應(yīng)接在Q點(diǎn),X射線從K極發(fā)出
D.高壓電源正極應(yīng)接在Q點(diǎn),X射線從A極發(fā)出
圖為X射線管的結(jié)構(gòu)示意圖,E為燈絲電源,要使射線管發(fā)出X射線,須在K、A兩電極間加上幾萬伏的直流高壓
A.高壓電源正極應(yīng)接在P點(diǎn),X射線從K極發(fā)出
B.高壓電源正極應(yīng)接在P點(diǎn),X射線從A極發(fā)出
C.高壓電源正極應(yīng)接在Q點(diǎn),X射線從K極發(fā)出
D.高壓電源正極應(yīng)接在Q點(diǎn),X射線從A極發(fā)出
圖為1射線管的結(jié)構(gòu)示意圖,E為燈絲電源。要使射線管發(fā)出X射線,須在K、A兩電極間加上幾萬伏的直流高壓,
A.高壓電源正極應(yīng)接在P點(diǎn),X射線從K極發(fā)出
B.高壓電源正極應(yīng)接在P點(diǎn),X射線從A極發(fā)出
C.高壓電源正極應(yīng)接在Q點(diǎn),X射線從K極發(fā)出
D.高壓電源正極應(yīng)接在Q點(diǎn),X射線從A極發(fā)出
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