Brain jogging

[Franklan]

I'd like to introduce a new topic, and I call it "brain jogging".

Well, jogging usually means that one uses muscles that haven't been used in a long time, where - in my book - "brain jogging" means one uses brain cells that haven't been used in a long time...

So, here it is, "stolen" from a German forum. All R are 1Ohm, what is R-total?

r-total.jpg (99.31 KiB) Viewed 648 times

[If you're not into electrictrictrictrictric, feel free to ignore this post]

[Robinson100]

Not an electric person here mate, but may we assume that you will be posting the answer in the not-too-distant future?

All I remember from school physics is V=IR but I very much doubt that will help find the solution!!!

Good idea, though!!!

[pappnase]

That was a pleasant exercise. I thought it through, noted what I expected the answer to be, then went and tested it and I was right.

Spoiler

1 ohm

Circuit.png (16.49 KiB) Viewed 586 times

If anyone else wants to play simulating simple circuits, there is a simulator here which can do far more than just simple resistor networks.

[Franklan]

Hint: Grab the resistor in the center of the picture with pliers and turn it 90° clockwise...

[Fraufruit]

Oh, thanks. Now it all makes sense.

[Franklan]

That was a pleasant exercise.

Feel free to keep this thread alive! Any ideas?

[Franklan]

Ah, just for the fun, a little bit of good old fashioned Sudoku, before one goes to bed...

The hardest Sudoku known to mankind.jpg (41.21 KiB) Viewed 480 times