串聯和并聯燈泡既光度取決於咩???(cert level)
2007-02-04 03:24:56 · 4 個解答 · 發問者 ? 2 in 科學 ➔ 其他：科學
電流
第一電池的電壓要一樣
第2電線長度粗幻
第3燈泡電座
每個燈泡的電座要唔同電泡同電壓
2007-02-04 04:24:15 · answer #1 · answered by ? 2 · 0⤊ 0⤋
取決于其真正的功率(而不是燈上寫的額定功率)
http://forum.cyberctm.com/forum/forumdisplay.php?fid=133
2007-02-04 15:22:18 · answer #2 · answered by ? 2 · 0⤊ 0⤋
Since power P consumed by a light bulb is given by:
P=I^2.R
where I is the current flow through the bulb, and R is the resistance of the bulb.
Since brightness of a bulb is related to the power it consumed, thus the brightness depends on the current through the bulb and its resistance.
2007-02-04 12:54:05 · answer #3 · answered by 天同 7 · 0⤊ 0⤋
如果總電壓不變,串聯和并聯燈泡既光度取決於流經燈泡的電流
2007-02-04 03:32:31 · answer #4 · answered by Stella 3 · 0⤊ 0⤋