Read the following statement.Which one is T(correct) and which one is F(wrong)?
1)The current is the same at different points in a series circuit.
2)In a parallel circuit,a smaller curret wil pas through the branch with a lower resistance.
5)If two identical light bulbs are connected in series,their brightness will be the same.
F.2 science (4) (T &F)
2007-12-16 8:50 pm
回答 (2)
2007-12-16 10:31 pm
1. True because the amperometer connected with any point of circuit can obtain same result (by experiment and there's no any resistance)
2. True but it depends on how smaller the current, current will pass through the branch with a lower R but not at all, there's sill have some will pass through the another way
3. False because the resistance of the second light bulb is summation of the R of first bulb and itself, thus its resistance is R' + R'', and current is inverse proportion of resistance, so the current via the first light bulb is higher that second one, hence the brightness of two light bulbs are different
2. True but it depends on how smaller the current, current will pass through the branch with a lower R but not at all, there's sill have some will pass through the another way
3. False because the resistance of the second light bulb is summation of the R of first bulb and itself, thus its resistance is R' + R'', and current is inverse proportion of resistance, so the current via the first light bulb is higher that second one, hence the brightness of two light bulbs are different
參考: me
收錄日期: 2021-04-13 14:44:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071216000051KK01461