【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
听说水果也能做电池,某兴趣小组的同学将一个土豆做成“水果电池”. 同学们通过查阅资料知道这种水果的电动势大约1伏左右,又用量程为0~3V、内阻约50kΩ的伏特表测其两极时读数为0.96V.可是当他们将四个这样的水果电池串起来给标为“3V,0.5A”的小灯泡供电时,灯泡并不发光.检查灯泡、线路均没有故障,而用伏特表直接测量其电压确实能达到3V多.(1)据你分析,出现这种现象的原因应当是:______(不要求写分析、推导过程).(2)为了能尽可能准确测定“水果电池”的电动势和内阻,若实验室除了导线和开关外,还有以下一些器材可供选择:A.电流表A1(量程为0~0.6A,内阻为1Ω)B. 灵敏电流表A2(量程为0~0.6mA,内阻为800Ω)C.灵敏电流表A3(量程为0~300μA,内阻未知)D.滑动变阻器R1 (最大阻值约10Ω)E.滑动变阻器R2(最大阻值约2kΩ)F.变阻箱(0~9999Ω)①实验中应选择的器材是______(填器材前的字母代号).②在方框中画出应采用的电路.
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