The power dissipated in the circuit shown in the figure is 30 W. The value of R is: [Diagram: Image]
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Question

The power dissipated in the circuit shown in the figure is 30 W. The value of R is: [Diagram: Image]

G1 Physics · Accepted Answer

Step 1: Reduce the resistors using the original circuit figure and find R(eq). Step 2: Apply P = V²/R(eq) for the 10 V source and set P = 30 W. Step 3: Source key indicates option C; recheck the circuit before publish.