Deck 10: Kirchhoff S Laws

Question 1

When a loop does not have any voltage source, the algebraic sum of the IR drops alone must equal (number only) ______________.

Answer 1

0

Question 2

Any circuit can be solved by applying ______________ laws for the voltages around the loop and the currents at a branch point

Answer 2

Kirchhoff's

Question 3

There is a method that uses voltage drops to specify the currents at a branch point, also called a ______________.

Answer 3

node

Question 4

A ______________ is the simplest possible closed path.

Question 5

A resistance shared by two mesh currents is referred to as a ______________ resistance.

Question 6

Any resistance common to two meshes has two ______________ mesh currents.

Question 7

The algebraic sign of the source in a mesh depends on its ______________.

Question 8

The advantage of ______________ currents is the pattern of algebraic signs for the voltages, without the need for tracing any branch currents.

Question 9

When analyzing ______________ currents, the zero term represents a missing mesh current.

Question 10

The only positive IR voltage in a mesh is for the R_T of each ______________ current in its own mesh.

Question 11

Node voltage analysis is often preferred over the method of branch currents because

A) the use of Ohm's law is not required
B) the use of simultaneous equations is not required
C) calculus can be used
D) basic mathematics is not required

Question 12

The reason for finding the voltage at a node is that node voltage can be used for

A) calculating all voltages in the loops
B) calculating all resistances in the loops
C) calculating all currents in the loops
D) calculating total power

Question 13

In current calculations, the simplest possible closed path is called a

A) loop
B) circuit
C) branch
D) mesh

Question 14

When analyzing mesh currents, a resistance shared by two mesh currents is called a

A) feedback resistance
B) combined resistance
C) mutual resistance
D) equivalent resistance

Question 15

The number of meshes is

A) the number of equations required
B) always less than two
C) the same as the number of resistors in the circuit
D) always more than two

Question 16

Any resistance common to two meshes has

A) two equal mesh currents
B) two opposite mesh currents
C) one opposite mesh current
D) one open mesh

Question 17

The algebraic sign of the source voltage in a mesh depends on

A) its polarity
B) how many meshes
C) how many resistors
D) how large the source voltage is

Question 18

The pattern of algebraic signs for the voltages, without the need for tracing any branch currents is

A) a disadvantage of mesh currents
B) an advantage of mesh currents
C) an advantage of the method of branch currents
D) a disadvantage of the method of branch currents

Question 19

The only positive IR voltage in a mesh is for the

A) R_T of each mesh current in its own mesh
B) R_T of each mesh current that is adjacent
C) mutual resistance
D) applied voltage

Question 20

What type of circuit analysis does not depend on series or parallel connections?

A) Ohm's law
B) Kirchhoff's laws
C) Thevenin's theorem
D) Norton's theorem

Question 21

The combining of positive and negative values is referred to as a

A) recombination
B) transposition
C) cancellation
D) algebraic sum

Question 22

Kirchhoff's current law is the basis for the practical rule in parallel circuits that the total line current

A) is equal to V divided by R
B) is equal to P divided by R
C) must equal the sum of the branch currents
D) must equal the difference of the branch currents

Question 23

Kirchhoff's current law can be applied when analyzing circuits containing

A) only resistors
B) only resistors and diodes
C) only op-amps
D) resistors, diodes, transistors, and op-amps

Question 24

Electrons flowing into a resistor make that end

A) positive with respect to the other end
B) negative with respect to the other end
C) higher in resistance
D) extremely warm

Question 25

Any closed path is called a

A) loop
B) node
C) branch
D) short

Question 26

What specifies the voltages around a loop?

A) The number of voltage sources
B) The value of total resistance
C) The loop equation
D) The loop power

Question 27

What is the symbol for the "sum of?"

A)?
B) ?
C) ?
D) ?

Question 28

By what term a missing mesh current is represented when solving mesh current equations?

A) ?
B) ?
C) 0
D) $\pi$

Question 29

Circuits that are not in series, parallel, or series-parallel or circuits with multiple power sources require more general methods of analysis that often include the application of Kirchhoff's laws.

Question 30

Kirchhoff's current law (KCL) states that at any point in a circuit, the algebraic sum of the currents directed into or out of a point must equal the total current.

Question 31

An algebraic sum means combining positive and negative values.

Question 32

Kirchhoff's current law is the basis for the practical rule in parallel circuits that the total line current must equal the difference of the branch currents.

Question 33

KCL cannot be applied when analyzing circuits containing diodes, transistors, or op-amps.

Question 34

Electrons flowing into a resistor make that end negative with respect to the other end.

Question 35

Any closed circuit path is called a loop.

Question 36

A loop equation specifies the resistances around the loop.

Question 37

The Greek letter ? means difference between.

Question 38

When a loop does not have any voltage source, the algebraic sum of the IR voltage drops alone must total zero.

Question 39

While solving for loop currents, a negative sign for a current means that this current is opposite to the assumed direction.

Question 40

In loop analysis, a branch point is also called a node.

Question 41

The method of node-voltage analysis and solving node equations is often shorter than the method of branch currents.

Question 42

Any circuit can be solved by applying Kirchhoff's laws for the voltages around the loop and the currents at a branch point.