Figure 7 represents an unknown circuit. Terminals \'a\' and \'b\' are the load t

Question

Figure 7 represents an unknown circuit. Terminals 'a' and 'b' are the load terminals. That is, a load resistor would be connected across these terminals. In figure 7, a potentiometer (variable resistor) is connected across the load terminals. A power meter is also connected across the terminals. The potentiometer is adjusted until to achieve maximum power delivered by the unknown circuit. the potentiometer reads 2 Ohms. What is the Thevenin's equivalent resistance for the unknown circuit? a) 1 Ohm b) 2 Ohms c) 6 Ohms d) insufficient information

Explanation / Answer

b) 2 Ohms

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