物理 -- 電學

👨🏻‍🏫 學術台其他 - 科學

John

2008-01-01 7:05 am

在一個電路, 如果降低了電阻值, 會降低電壓還是加大電流? 為什麼?

回答 (4)

[匿名]

2008-01-01 7:36 am

✔ 最佳答案

In the series,
If you decrease the resistance of the circult.The current will increase.
According to the formula?
V=IR If the resistance(R)decrease V unchange The current will increase.
In the parallel,
If you decrease the resistance of the circult.The volt remain unchange(because yje volt is from the cell.however the current will become smaller.
According to the formula:
the equivalent R will become bigger when you decrease the resistance of the circult.
Therefore V=IR the R become bigger will make the volt smaller.

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