The value of V x and the current flowing in the loop.

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Chapter 1, Problem 1.67P

To determine

The value of Vx and the current flowing in the loop.

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The circuit shown in Figure P1.67 is the electrical model for an electronic megaphone, in which the 8–Ω resistance models a loudspeaker, the source V x and the 5–kΩ resistance represent a microphone, and the remaining elements model an amplifier. Given that the power delivered to the 8–Ω resistance is 8 W, determine the current circulating in the right-hand loop of the circuit. Also, determine the value of the microphone voltage V x.

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