Deck 12: Series-Parallel Circuits and Loaded Voltage Dividers

Question 1

The bleeder is defined as that portion of the voltage divider that is connected perpendicular to the load.

Answer 1

False

Question 2

To apply Kirchhoff's current law, we arbitrarily assign negative direction to currents flowing into the junction and positive direction to currents coming out of the junction.

Answer 2

False

Question 3

Kirchhoff's voltage law states that around any closed loop, the algebraic sum of the voltages is equal to zero.

Answer 3

True

Question 4

The symbol || means ____.

A)"not equal to"
B)"the parallel combination of"
C)"the combination of"
D)"side by side"

Question 5

A high percentage of voltage regulation is undesirable and can be improved by ____ the value of the so-called bleeder resistor.

A)stabilizing
B)minimizing
C)maximizing
D)increasing

Question 6

The word load refers to any device that draws voltage from the current divider.

Question 7

The nominal size of a load is determined by the current it draws, not by ____.

A)its resistance value
B)the current it resists
C)its voltage
D)its current value

Question 8

The total amount of current flowing into a junction must equal the current coming out.

Question 9

Pure series circuits and pure parallel circuits are ____ encountered in the practical applications of electricity and electronics.

A)always
B)often
C)seldom
D)never

Question 10

It is common to deal with circuits that are either pure series circuits or pure parallel circuits.

Question 11

Simple (unloaded) voltage dividers are series circuits, while loaded voltage dividers represent ____.

A)series circuits as well
B)parallel circuits
C)loaded series circuits
D)series-parallel circuits

Question 12

Kirchhoff's voltage law may be restated to say that around any closed loop, the sum of the voltage drops is equal to ____.

A)zero
B)one
C)the sum of the voltage rises
D)the sum of the voltage rises divided by the number of the voltage rises

Question 13

A small resistance is a small load and a large resistance represents a large load.

Question 14

The design of a voltage divider begins with choosing the size of the bleeder resistor so that it will draw at least ____% of the load current.

A)10
B)20
C)30
D)40

Question 15

There is no one formula that can be applied to an entire circuit to obtain the desired answer or answers.

Question 16

Ohm's law must be applied first to one part of the circuit and then to another part to obtain a desired answer.

Question 17

A junction of three wires is called a node.

Question 18

In a problem with three closed loops, we track the loops in a clockwise direction and obtain the following information: for Loop 1: - 40 V - 60 V + 100 V = 0
For Loop 2: - 10 V - 30 V - 60 V + 100 V = 0
For Loop 3: - 40 V - 60 V + 60 V + 30 V + 10 V = 0
This confirms ____.

A)Ohm's law
B)the existence of nodes
C)Kirchhoff's voltage law
D)a single parallel circuit

Question 19

The output from a voltage divider changes with varying load conditions, and this fluctuation of voltage output is referred to as ____.

A)voltage regulation
B)output regulation
C)fluctuation regulation
D)regulation

Question 20

When information is given concerning the amount and direction of the current in only two of the wires, it is possible to deduce ____ of the unknown current in the third wire.

A)the amount but not the direction
B)the direction but not the amount
C)the amount and direction
D)neither the amount nor the direction