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Compute the power absorbed by each element of the circuit of Fig. 3.67.
■ FIGURE 3.67
![Check Mark](/static/check-mark.png)
Find power absorbed by each element in the circuit.
Answer to Problem 27E
Power absorbed by independent voltage source is
Explanation of Solution
Formula used:
The expression for power absorbed by voltage source is as follows,
Here,
The expression for power absorbed by resistor is as follows,
Here,
Calculation:
The circuit diagram is redrawn as shown in Figure 1,
Refer to the redrawn Figure 1,
The expression for KVL in mesh
Here,
The expression for voltage
Here,
The expression for voltage
Here,
Refer to the redrawn Figure 1,
Substitute
Substitute
Rearrange equation (6) and (7),
The equations so formed can be written in matrix form as,
Therefore, by Cramer’s rule,
The determinant of coefficient matrix is as follows,
The 1st determinant is as follows,
The 2nd determinant is as follows,
Simplify for
Simplify for
Substitute
Current is leaving the positive terminal and we are calculating power absorbed means current should leave by negative terminal so we will use magnitude of voltage with negative sign, Thus the value of
Substitute
So power absorbed by independent voltage source
Substitute
So power absorbed by resistor
Substitute
So power absorbed by dependent voltage source
Substitute
So power absorbed by resistor
Substitute
So power absorbed by resistor
Conclusion:
Thus, power absorbed by independent voltage source is
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Chapter 3 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
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