XPost: uk.rec.driving   
   From: a@b.com   
      
   "Dave Plowman"  wrote in message   
   news:53419fdcd1dave@davenoise.co.uk...   
   > In article <51783438$0$49048$c3e8da3$40cb80c2@news.astraweb.com>,   
   >   bm  wrote:   
   >> > Take for example a 6 volt DC supply connected to an LED in series with   
   >> > a 200 ohm resistor. 2V 20mA at the LED, 4V 20mA in the resistor.   
   >> >   
   >> > Now change the supply to 4V.   
   >> > 2V 10mA at the LED, 2V 10mA in the resistor.   
   >   
   >> Fuck a duck, they DID teach you something.   
   >   
   > That makes two of you who failed GCE electronics.   
      
   Sorry, Dave, but I think you'll find that his 'sums' are pretty much   
   correct, amazingly.   
      
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