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tokomon 2013-4-10 08:08 PM

potential divider

點解B電勢差係 50/200+50 * 3 而唔係 50/100+50 * 3
      C電勢差係 66.7/100+66.7 * 3

THX~

↗亢龍無悔↙ 2013-4-10 11:19 PM

When P touches B, the resistance for bulb and AP become 50. BD is 200.

Similar case when P touches C

下次試下睇清楚啲題目先問問題,睇唔清楚就要佩眼鏡:smile_04: :smile_04:

tokomon 2013-4-13 11:21 AM

[quote]原帖由 [i]↗亢龍無悔↙[/i] 於 2013-4-10 11:19 PM 發表 [url=http://www.discuss.com.hk/redirect.php?goto=findpost&pid=358149412&ptid=21744830][img]http://www.discuss.com.hk/images/common/back.gif[/img][/url]
When P touches B, the resistance for bulb and AP become 50. BD is 200.

Similar case when P touches C

下次試下睇清楚啲題目先問問題,睇唔清楚就要佩眼鏡:smile_04: :smile_04: [/quote]

:smile_42:我真係冇睇清楚題目
thanks for your help~
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