Deck 9: Kirchhoffs Law, Thevenins and Nortons Theorems

Question 1

In a circuit, three wires form a junction. The currents in two of the wires are 5 A and 12 A. The current in the other wire is _____.

A) 60 A
B) 17 A
C) 7 A
D) 7 A or 17 A

Answer 1

D

Question 2

The _______________ theorem is used to find the current flow through any branch of a circuit containing more than one power source.

Answer 2

superposition

Question 3

What law states that the algebraic sum of the currents entering and leaving a point must equal zero?

A) Kirchhoff's voltage law
B) Norton's current law
C) Thevenin's voltage law
D) Kirchhoff's current law

Answer 3

D

Question 4

Before determining the algebraic sum of voltages using Kirchhoff's voltage law, you must first determine which end of the _______________ element is positive and which is negative.

Question 5

Circuit networks can be simplified down to an equivalent circuit, with a single voltage source and series resistor. This conversion is done in accordance with _____.

A) Thevenin's theorem
B) Norton's theorem
C) the superposition theorem
D) Kirchhoff's laws

Question 6

Circuit networks can be reduced to a single current source and a single parallel resistance. This conversion is done in accordance with _____.

A) Thevenin's theorem
B) Norton's theorem
C) the superposition theorem
D) Kirchhoff's laws

Question 7

The current in any branch of a circuit supplied by a multipower source can be determined by finding the current produced in that particular branch by each of the individual power sources acting alone. This simplification is done in accordance with _____.

A) Thevenin's theorem
B) Norton's theorem
C) the superposition theorem
D) Kirchhoff's laws

Question 8

To use Kirchhoff's law, start at some point and add the voltage drops around any _____ loop.

A) open
B) closed

Question 9

Write Kirchhoff's two laws dealing with voltage and current relationships in an electrical circuit.

Question 10

What law states that the algebraic sum of the voltage sources and voltage drops in a closed circuit must equal zero?

A) Kirchhoff's voltage law
B) Kirchhoff's current law
C) Thevenin's voltage law
D) Norton's current law