如图所示,一只白炽灯L标有4V 4W的字样,将它与一个定值电阻R0串联后接入电源电压恒定不变为6V如图所示,一只白炽灯L标有4V 4W的字样,将它与一个定值电阻R0串联后接入电源电压恒定不变为6V的
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![如图所示,一只白炽灯L标有4V 4W的字样,将它与一个定值电阻R0串联后接入电源电压恒定不变为6V如图所示,一只白炽灯L标有4V 4W的字样,将它与一个定值电阻R0串联后接入电源电压恒定不变为6V的](/uploads/image/z/6202016-8-6.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E4%B8%80%E5%8F%AA%E7%99%BD%E7%82%BD%E7%81%AFL%E6%A0%87%E6%9C%894V+4W%E7%9A%84%E5%AD%97%E6%A0%B7%2C%E5%B0%86%E5%AE%83%E4%B8%8E%E4%B8%80%E4%B8%AA%E5%AE%9A%E5%80%BC%E7%94%B5%E9%98%BBR0%E4%B8%B2%E8%81%94%E5%90%8E%E6%8E%A5%E5%85%A5%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E6%81%92%E5%AE%9A%E4%B8%8D%E5%8F%98%E4%B8%BA6V%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E4%B8%80%E5%8F%AA%E7%99%BD%E7%82%BD%E7%81%AFL%E6%A0%87%E6%9C%894V+4W%E7%9A%84%E5%AD%97%E6%A0%B7%2C%E5%B0%86%E5%AE%83%E4%B8%8E%E4%B8%80%E4%B8%AA%E5%AE%9A%E5%80%BC%E7%94%B5%E9%98%BBR0%E4%B8%B2%E8%81%94%E5%90%8E%E6%8E%A5%E5%85%A5%E7%94%B5%E6%BA%90%E7%94%B5%E5%8E%8B%E6%81%92%E5%AE%9A%E4%B8%8D%E5%8F%98%E4%B8%BA6V%E7%9A%84)
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