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From: karn@Ucb-Vax.ARPA
Newsgroups: net.ham-radio
Subject: Re: Thevinin/Norton equivalents (SPOILER)
Message-ID: <1984@brl-tgr.ARPA>
Date: Tue, 8-Oct-85 09:34:55 EDT
Article-I.D.: brl-tgr.1984
Posted: Tue Oct  8 09:34:55 1985
Date-Received: Sat, 12-Oct-85 20:52:37 EDT
Sender: news@brl-tgr.ARPA
Lines: 11

You can't, if you're allowed only to see how the two terminals behave
to external circuits; they're equivalent.

However, with the terminals open-circuited, the black box with the
current source will be dissipating 1 watt of power, while the the one
with the voltage source will not be dissipating anything. Short the
terminals and the situation reverses. Stick each box into a picnic
cooler with a thermometer, and wait. This is the only way I see to
solve the puzzle.

Phil