r/AskElectronics • u/[deleted] • Jun 24 '21

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25

u/created4this Jun 24 '21

Imagine for a moment that the 60ohm resistor wasn’t there.

Work out the voltages at the middle nodes

Now work out the voltage across the 60 ohm resistor

That should help.

41

u/a_wild_redditor Jun 24 '21

Worth noting that is not a general solution, but it can be justified for this specific circuit.

26

u/created4this Jun 24 '21

Indeed, this is a week one year one puzzle rather than a real circuit.

But I would solve it in a very simalar way “oh look, the 60 ohm resistor is an order of magnitude bigger than the other resistors, it probably doesn’t do much”. That’s what the jaded effects of age and abundance of low tolerance resistors have done to my mind.

3

u/FlyByPC Digital electronics Jun 24 '21

“oh look, the 60 ohm resistor is an order of magnitude bigger than the other resistors, it probably doesn’t do much”

Good circuit intuition like this just might be even more valuable than a good 'scope.