小明同学发现客厅白炽灯的发光比房间白炽灯的发光亮,对这种现象

小明同学发现客厅白炽灯的发光比房间白炽灯的发光亮,对这种现象判断正确的是(    )

A.客厅白炽灯灯丝的电流大                B.客厅白炽灯灯丝的电阻大

C.客厅白炽灯两端的电压大                D.以上判断都有可能

 

答案

A

解析:略

 

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