Deck 7: Series-Parallel Circuits

Question 1

A short within a ______________ circuit does not necessarily mean that the circuit will draw excessive current.

Answer 1

series-parallel

Question 2

A series-parallel circuit is also called a ______________ circuit.

Answer 2

combination

Question 3

The total line current equals the ______________ of the branch currents for all parallel strings.

Answer 3

sum

Question 4

There can be any number of ______________ strings and more than two series resistances in a string.

Question 5

The ______________ components must be in one current path without any branch points.

Question 6

Any individual series R has its own IR drop that must be ______________ than the total V_T.

Question 7

A Wheatstone bridge is a circuit that is used to determine the value of an unknown ______________.

Question 8

A very sensitive zero-centered current meter is called a ______________.

Question 9

A variety of ______________ are used in bridge circuits for detecting changes in pressure, flow, light, etc.

Question 10

A high resolution ______________ can be used to determine the value of an unknown resistor.

Question 11

How can a technician determine which parallel resistive branch has a shorted component?

A) Measure branch currents; the one with all the current in it has the short.
B) Measure the applied voltage.
C) Measure total resistance.
D) Use an oscilloscope to measure voltage.

Question 12

Any circuit that combines both series and parallel connections is a

A) series circuit
B) parallel circuit
C) series-parallel circuit
D) resonant circuit

Question 13

What type circuit is used when it is necessary to obtain different voltage and current values from a single supply voltage?

A) Series circuit
B) Parallel circuit
C) Series-parallel circuit
D) Resonant circuit

Question 14

When series resistors are connected in parallel, the series resistors form a

A) string
B) bridge
C) rectifier
D) resonant circuit

Question 15

If one 120 V, 100 W bulb was connected across a 240 V source,

A) excessive current could burn out filaments
B) the bulb will be dimly lit
C) the bulb will operate normally
D) the bulb will be brightly lit

Question 16

If two series-connected 120 V, 100 W bulbs were connected across a 240 V source,

A) excessive current could burn out filaments
B) the bulbs will be dimly lit
C) the bulbs will operate normally
D) the bulbs will be brightly lit

Question 17

When a parallel branch contains series resistors, both resistors

A) have the same voltage
B) have the same current
C) have the same resistance
D) are open

Question 18

For any one resistance in a string, the current in the string multiplied by the resistance equals the

A) applied voltage
B) power dissipated by that particular resistance
C) the IR drop across that particular resistance
D) the IR drop across all resistors

Question 19

The sum of the branch currents for all parallel strings equals the

A) individual branch current
B) total power
C) total current
D) total voltage

Question 20

How many parallel strings can there be in a series-parallel circuit?

A) One
B) Two
C) Three
D) Any number of

Question 21

When a parallel bank exists in a series path, both resistors have the same

A) voltage
B) current
C) resistance
D) power

Question 22

To find the resistance of an entire series-parallel circuit,

A) combine the parallel resistances in each bank and add the series resistance
B) combine the series resistances in each bank and add the parallel resistances
C) measure the total current and divide the applied voltage into it
D) measure the total power and multiply it by applied voltage

Question 23

There can be more than two parallel resistances in a bank and

A) only one bank in series
B) only two banks in series
C) only three banks in series
D) any number of banks in series

Question 24

Components that are in one current path without any branch points are in

A) series
B) parallel
C) series-parallel
D) resonance

Question 25

Any individual series R has its own IR drop that must be

A) more than the total V_T
B) less than the total V_T
C) equal to V_T
D) more than10 volts

Question 26

In a series-parallel circuit, if R_T is to be determined, which of the following formulas should be used?

A) R_{T = VT x IT}
B) R_{T = VT/IT}
C) R_{T = IT/VT}
D) R_{T = PT/IT}

Question 27

What is a circuit that is used to determine the value of an unknown resistance?

A) String
B) Zener regulator
C) Colpitts oscillator
D) Wheatstone bridge

Question 28

A very sensitive zero-centered current meter is called a(n)

A) ammeter
B) Amprobe
C) galvanometer
D) VTVM

Question 29

One method used to accurately determine the value of an unknown resistor is by using a(n)

A) high resolution DMM
B) bridge rectifier
C) low pass filter
D) voltmeter

Question 30

Resistors referred to as the ratio arm are used in the

A) series banks
B) parallel strings
C) Wheatstone bridge
D) generator

Question 31

The ratio arm can be varied in most cases, typically in multiples of

A) 2
B) 4
C) 5
D) 10

Question 32

When the Wheatstone bridge is balanced, it can be analyzed simply as

A) two series strings in parallel
B) two parallel strings in series
C) three series strings
D) three parallel strings

Question 33

A variety of sensors are used in bridge circuits for detecting changes in

A) pressure
B) voltage
C) color
D) current

Question 34

A circuit with infinitely high resistance and practically zero current is a(n)

A) short
B) open
C) bridge
D) amplifier

Question 35

Each branch current equals the voltage applied across the branch divided by the total resistance in the branch.

Question 36

The sum of the series IR drops in the string equals the voltage across the entire string.

Question 37

When a parallel bank exists in a series path, both resistors have the same current flowing through them.

Question 38

There can be only two parallel strings and only one series resistance in a string.

Question 39

There can be more than two parallel resistances in a bank and any number of banks in series.

Question 40

In a series-parallel circuit, any individual series R has its own IR drop that must be more than the total V_T.

Question 41

A high resolution DMM can accurately determine the value of an unknown resistor.

Question 42

When the Wheatstone bridge is balanced, it can be analyzed simply as two series strings in parallel.

Question 43

A variety of sensors are used in bridge circuits for detecting changes in pressure, flow, light, and temperature.

Question 44

With a negative temperature coefficient (NTC) thermistor, as temperature goes up, resistance goes down.

Question 45

A short within a series-parallel circuit means that the circuit will definitely draw excessive current from the voltage source.

Question 46

A short circuit has practically zero resistance.

Question 47

In a series circuit containing three or more components, the voltage across the defective component changes in a direction that is opposite to the direction of the change in voltage across good components.