如将电阻分别为R1=400Ω,R2=100Ω的两只电热器并联,接在220V的电源上,可知并联电路总电流为()。A、0.75AB、1.75AC、2.75AD、3.75A
如将电阻分别为R1=400Ω,R2=100Ω的两只电热器并联,接在220V的电源上,可知并联电路总电流为()。
- A、0.75A
- B、1.75A
- C、2.75A
- D、3.75A
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