Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site nsc-pdc.UUCP Path: utzoo!decvax!bellcore!petrus!sabre!zeta!epsilon!gamma!ulysses!mhuxr!mhuxt!houxm!vax135!cornell!uw-beaver!tektronix!reed!nsc-pdc!austin From: austin@nsc-pdc.UUCP (Austin Mack) Newsgroups: net.analog,net.puzzle Subject: Thevinin/Norton equivalents Message-ID: <488@nsc-pdc.UUCP> Date: Thu, 3-Oct-85 20:15:33 EDT Article-I.D.: nsc-pdc.488 Posted: Thu Oct 3 20:15:33 1985 Date-Received: Fri, 4-Oct-85 15:57:34 EDT Distribution: na Organization: NSC Portland Development Center, Portland Oregon Lines: 72 Xref: sabre net.analog:204 net.puzzle:238 This is an old one but most people I've met have not seen it. If you solve it in less than an hour, give yourself an 'A'. The problem is as follows: You are given 2 black boxes. One contains a perfect 1 volt voltage source with a 1 ohm resistor in series connected to 2 external terminals ( assume 0 resistance wiring). The other box contains a perfect 1 amp current source with a 1 ohm resistor in parallel with it connected to the external terminals. Can you identify (without opening) which box is which? I'll post the correct answer(s). /\ /\ / \ / \ |------------------\ / \ / \-------------X terminal | \ / \ / /-----|-------\ \/ \/ / \ / \ 1 ohm / \ | | \ ------------ / \/ \ / /\ \/ / \ /\ 1 volt source / ------------- \ | | \ / \ / \ / \------|------/ | |-----------------------------------------------------X terminal |-------------------------------------|--------------X terminal | | /-----|-------\ | / \ | / \ \ / \ \ | | \ \ ------------ / / \/ \ / / /\ \/ 1 amp source / 1 ohm / \ /\ / / ------------- \ / | | / \ / \ \ / \ \ / \ \------|------/ | | | |------------------------------------|----------------X terminal Austin Mack Brought to you by Super Global Mega Corp .com