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In the previous question if the combined current in the two resistors is $$3\text{ A}$$, the rate of heat production in the combination is
The equivalent resistance is $$\frac{6 \times 3}{6 + 3} = 2\,\Omega$$. The rate of heat production is $$I^2 R = 3^2 \times 2 = 18\text{ W}$$.
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