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November 01, 2025, 09:42:47 am
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Author Topic: Question.  (Read 672 times)  Share 

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Stroodle

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Question.
« on: June 04, 2010, 04:59:37 pm »
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So using a switch on voltage of 0.7V, I'm getting 106mA as the answer to the following question. Solutions say that's wrong though..

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m@tty

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Re: Question.
« Reply #1 on: June 04, 2010, 05:08:33 pm »
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Where A and B are the two branches of the parallel section.



I think...
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2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

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lachymm

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Re: Question.
« Reply #2 on: June 04, 2010, 05:25:13 pm »
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I am interested to know the answer...LED's in parallel is confusing.
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m@tty

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Re: Question.
« Reply #3 on: June 04, 2010, 05:30:20 pm »
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Not really. Each branch gets 6 volts, then proceed as usual. The lone 100 ohm resistor gets 6 V and the other 100 ohm resistor get whatever is left over from the diode. Then for each branch, and add.
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Stroodle

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Re: Question.
« Reply #4 on: June 04, 2010, 06:11:03 pm »
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Yeah, you're right matty. I stupidly assumed that 5.3V was across both sections (just doubled the current through the resistor in series with the led)...
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lachymm

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Re: Question.
« Reply #5 on: June 04, 2010, 08:04:52 pm »
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Cheers, matty
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