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A network of four resistances is connected to $$9$$ V battery, as shown in figure. The magnitude of voltage difference between the points $$A$$ and $$B$$ is _____ V.
Correct Answer: 3
$$V_A = 9 \left( \frac{4}{2 + 4} \right)$$
$$V_A = 6$$
$$V_B = 9 \left( \frac{2}{4 + 2} \right)$$
$$V_B = 3$$
$$|V_A - V_B| = 3$$
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