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Concept explainers
For the bridge circuit shown in Fig. 4.140, find the load RL for maximum power transfer and the maximum power absorbed by the load.
Figure 4.140
![Check Mark](/static/check-mark.png)
Find the maximum power transferred and maximum power absorbed by the load resistor
Answer to Problem 74P
The maximum power transferred and maximum power absorbed by the load resistor
Explanation of Solution
Given data:
Refer to Figure 4.140 in the textbook.
The voltage source is
Formula used:
Write the expression to find the power delivered to the resistor.
Here,
Calculation:
In the given circuit, find the Thevenin resistance by turning off the voltage source
The modified circuit is shown in Figure 1.
In Figure 1, the Thevenin resistance is,
Refer to Figure 4.139 in the textbook.
The given circuit is modified as shown in Figure 2 to find the Thevenin voltage.
In Figure 2, the voltage
In Figure 2, the voltage
In Figure 2, apply Kirchhoff’s voltage law for the right bottom loop as follows.
Substitute
Substitute
Conclusion:
Thus, the maximum power transferred and maximum power absorbed by the load resistor
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Chapter 4 Solutions
Fundamentals of Electric Circuits
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