
(a)
Find the voltages
(a)

Answer to Problem 44E
The values of voltages
Explanation of Solution
Given data:
Refer to Figure 13.64 in the textbook for the given circuit.
Formula used:
Write the expression for transformer ratio in terms of voltages as follows:
Here,
Write the expression for equivalent resistance of secondary winding when the transformer is referred to the primary winding as follows:
Here,
Calculation:
Consider left side transformer as first transformer and right side transformer in the given circuit as second transformer to obtain the required objectives.
From the given source current, write the maximum value of current
From the given circuit, the transformer ratio for two transformers are written as follows:
Use the current division rule, the expression in Equation (2), and write the expression for current through
Substitute
From the given circuit, write the expression for current through
Substitute
From the given circuit, write the expression for voltage across primary winding of the first transformer as follows:
Substitute
Use the expression in Equation (1) and write the expression for voltage across secondary winding of the first transformer as follows:
Substitute
From the given circuit observe the dot convention and write the expression for
Substitute 0.687 V for
Use voltage division rule, expression in Equation (2), and write the expression for voltage across primary winding of the second transformer as follows:
Substitute
From the given circuit, write the expression for
Substitute
Conclusion:
Thus, the values of voltages
(b)
Find the average power delivered to each resistor in the given circuit.
(b)

Answer to Problem 44E
The average power delivered to
Explanation of Solution
Formula used:
Write the expression for average power delivered to resistor as follows:
Here,
Calculation:
From Part (a), the voltage across
Substitute
Write the expression for voltage across
Substitute
Write the expression for voltage across
From Part (a), substitute
Write the expression for voltage across
From Part (a), substitute
Modify the expression in Equation (3) to obtain the average power delivered to
Substitute 3.483 V for
Modify the expression in Equation (3) to obtain the average power delivered to
Substitute 0.04742 V for
Modify the expression in Equation (3) to obtain the average power delivered to
Substitute
Modify the expression in Equation (3) to obtain the average power delivered to
Substitute
Conclusion:
Thus, the average power delivered to
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Chapter 13 Solutions
Engineering Circuit Analysis
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