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[单选题]
有一热电阻为20欧接到电压为220V的电路上,2s后电阻所放出的热量为()
A.2420J
B.3430J
C.4840J
D.4850J
提问人:网友hantuotuo
发布时间:2022-01-07
A.2420J
B.3430J
C.4840J
D.4850J
A、10mA,9.3mA; 1mA,0.3mA
B、10mA,1mA;9.3mA,3mA
C、1mA,0.93mA;0.1mA,0.03mA
D、10mA,0.93mA;1mA,0.03mA
A、三个电阻串联
B、R1、R2并联后与R3串联
C、三个电阻并联
D、R1、R2串联后与R3并联
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