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P 5.5-2 Two black
boxes are shown in Figure P 5.5-2. Box A contains
the Thévenin equivalent of some linear circuit, and
box B contains the Norton equivalent of the same circuit. With access to just
the outsides of the boxes and their terminals, how can you determine which is
which, using only one shorting wire? |
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Figure
P 5.5-2 |
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If you hold Box A it will not have a completed circuit so it will be
dissipating no energy. It will be cool
to the touch. Box B is dissipating
power through the 1 Ω
resistor, so Box B will feel warmer to the touch than Box A. |
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If you apply the shorting wire
to Box B, the resistor in Box B will no longer dissipate power, so Box B will
become cooler to the touch. If you
apply the shorting wire to Box A, current now will flow and power will
dissipate in the resistor causing Box A to warm to the touch. |
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