Find the node voltage VA. 6 V 12 V 4.25 V 3 V

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4.25 V

Branch, Loop and Node Analyses problems

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1. In assigning the direction of branch currents,
Options
A. the directions are critical
B. the directions are not critical
C. they must point into a node
D. they must point out of a node

2. The branch current method uses
Options
A. Kirchhoff's voltage and current laws
B. Thevenin's theorem and Ohm's law
C. Kirchhoff's current law and Ohm's law
D. the superposition theorem and Thevenin's theorem

4. A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?
Options
A. 1 MΩ
B. 100 kΩ
C. 1 kΩ
D. 330 Ω

5. The parallel combination of a 6.8 kΩ resistor and a 10 kΩ resistor is in series with the parallel combination of a 2.2 kΩ resistor and a 1 kΩ resistor. A 100 V source is connected across the circuit. The resistor(s) with the greatest voltage drop is (are)
Options
A. 6.8 kΩ
B. 2.2 kΩ
C. 6.8 kΩ and 10 kΩ
D. 2.2 kΩ and 1 kΩ

7. The expansion method for evaluating determinants is
Options
A. better than any other method
B. good for only one determinant
C. more flexible than the cofactor method
D. good for second- and third-order determinants

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