问题
填空题
一根导体两端电压是3V时，通过导体的电流为0.5A，如果导体两端的电压增大到6V时，导体的电阻是______．
答案
根据欧姆定律可得：
导体的电阻R=
=U I
=6Ω；3V 0.5A
因电阻的大小与导体两端的电压，通过的电流无关
所以如果导体两端的电压增大到6V时，导体的电阻6Ω不变；
故答案为：6Ω．
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一根导体两端电压是3V时，通过导体的电流为0.5A，如果导体两端的电压增大到6V时，导体的电阻是______．
根据欧姆定律可得：
导体的电阻R=
=U I
=6Ω；3V 0.5A
因电阻的大小与导体两端的电压，通过的电流无关
所以如果导体两端的电压增大到6V时，导体的电阻6Ω不变；
故答案为：6Ω．
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