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Five resistors are connected as shown in the diagram. The equivalent resistance between A and B is

1. 6 a9
2. 9 a9
3. 12 a9
4. 15 a9

Correct answer: 6 a9

Solution

The five-resistor network simplifies by combining the appropriate series and parallel parts of the diagram. The resulting equivalent resistance between A and B is 6 a9.

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