Concept explainers
(a)
Redraw the circuit to measure the voltage across
(a)
Answer to Problem 80P
The circuit is redrawn to measure the voltage across
Explanation of Solution
The voltmeter should be connected in parallel with the resistor to measure the voltage across it.
Conclusion:
The circuit is shown below,
(b)
Find the voltage across the
(b)
Answer to Problem 80P
The voltage across the
Explanation of Solution
The voltmeter is connected in parallel with the
From Kirchhoff’s junction rule,
From Kirchhoff’s loop rule for the left mesh,
From Kirchhoff’s loop rule for the right mesh,
Conclusion:
Solve equation III to get
Substitute the above equation in equation I.
Substitute the above equation in equation II.
Substitute the above value in equation IV.
Then, the reading on the voltmeter is,
Therefore, the voltage across the
(c)
Find the voltage across the
(c)
Answer to Problem 80P
The voltage across the
Explanation of Solution
The voltmeter is connected in parallel with the
From Kirchhoff’s loop rule for the right mesh,
Conclusion:
Solve equation V to get
Substitute the above equation in equation I.
Substitute the above equation in equation II.
Substitute the above value in equation VI.
Then, the reading on the voltmeter is,
Therefore, the voltage across the
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Chapter 18 Solutions
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