Deck 2: Voltage, Current, and Resistance

Question 1

The Nickel-Metal Hydride battery is an example of a secondary battery.

Answer 1

True

Question 2

Resistance is the opposition to the flow of current.

Answer 2

True

Question 3

An elementW ith a relatively large amount of electrons in the valence ring is considered to be a good conductor.

Answer 3

False

Question 4

A ormally Open Push Button switch can carry currentW hen not pushed.

Question 5

The movement of free electrons through a conductor is called current

Question 6

A resistor color coded with yellow, violet and orange bands has a value of 4.7

Question 7

Electrons have a positive charge.

Question 8

For electrical current to flow in a circuit voltage must be applied to that circuit.

Question 9

Electrons attract each other.

Question 10

A(n)________ is a material that has many free electrons.

A)semiconductor
B)insulator
C)poor conductor
D)conductor

Question 11

Electromotive force is measured in volts.

Question 12

A resistor with orange, orange, red and gold bands has a value and tolerance of___________

A) $3.3 \mathrm { k } \Omega \pm 5 \%$
B) $3.3 \mathrm { k } \Omega \pm 10 \%$
C) $33 \mathrm { k } \Omega \pm 10 \%$
D) $33 \mathrm { k } \Omega \pm 5 \%$

Question 13

To measure the current through a resistor, place the ammeter so the current must pass through the meter.

Question 14

If a resistor is color coded with red, red, orange and silver bands, the resistance equals __________,the lower tolerance limit equals________, and the upper tolerance limit equals______

A) $22 \mathrm { k } \Omega , 19.8 \mathrm { k } \Omega , 24.2 \mathrm { k } \Omega$
B) $22 \mathrm { k } \Omega , 17.6 \mathrm { k } \Omega , 26.4 \mathrm { k } \Omega$
C) $22 \mathrm { k } \Omega , 20.9 \mathrm { k } \Omega , 23.1 \mathrm { k } \Omega$
D) $22 \mathrm { k } \Omega , 21.5 \mathrm { k } \Omega , 22.4 \mathrm { k } \Omega$

Question 15

A SPST switch is used to control one circuit.

Question 16

The opposition to the flow of current is called ________.

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

Question 17

The ohm is the basic unit of resistance.

Question 18

An insulator is a materialW ith ________.

A)very many free electrons
B)some free electrons
C)very few free electrons
D)all free electrons

Question 19

A resistor color-coded with brown, black and orange bands has a value of 10,000

Question 20

A generator converts electrical energy into mechanical energy.

Question 21

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Which switch in Figure 2-1 could be used to open a circuit momentarily?

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 22

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Which switch in Figure 2-1 could be used to simultaneously open or simultaneously close two circuits?

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 23

A source, a path, and a load ________.

A)make up a basic circuit
B)do not make up a complete circuit
C)can only be an open circuit
D)will allow current to flow if the switch is open

Question 24

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Identify the Normally Closed Push Button switch in Figure 2-1.

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 25

Which unit of charge contains 6.25 × 10¹⁸ electrons?

A)a coulomb
B)an ampere
C)aVolt
D)a joule

Question 26

What do you call a diagram that shows the electrical connections of a circuitʹs components?

A)a pictorial diagram
B)an electrical diagram
C)a schematic diagram
D)a block diagram

Question 27

To measure a circuitʹs source voltage, the voltmeter must ________.

A)be placed across the source
B)be placed in series in the circuit
C)have the red lead towards the negative side of the source
D)have the black lead towards the positive side of the source

Question 28

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Identify the Rotary switch in Figure 2-1.

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 29

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Identify the DPDT switch in Figure 2-1.

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 30

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Identify the Normally Open Push Button switch in Figure 2-1.

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 31

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Identify the DPST switch in Figure 2-1.

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 32

A conductor is a material that has ________.

A)few free electrons
B)many free electrons
C)a positive charge
D)a structure similar to semiconductors

Question 33

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-The Rotary switch in Figure 2-1 is most likely to be used as ________.

A)a selector for differentVoltages in a power supply.
B)a range selector switch in an analogV
Oltmeter.
C)an old manual TV channel selector.
D)all of the above

Question 34

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Which switch in Figure 2-1 could be used to switch two inputs to different output positions?

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 35

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Which switch in Figure 2-1W ould probably be used to control a light and a fan at the same time?

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 36

If the current in a circuit equals 0 A, it is likely that the ________.

A)voltage is too high
B)circuit has a short
C)resistance is too low
D)circuit is open

Question 37

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$


-Which switch in Figure 2-1 is usually used to control a doorbell?

A)graph (a)
B)graph (b)
C)graph (c)
D)graph (d)
E)graph (e)

Question 38

If a resistor equals 1.2 $\Omega \pm 5 \%$ , its color code is________

A) brown, red, silver, gold
B) brown, red, gold, gold
C) brown, black, gold, silver
D) brown, black, red, gold

Question 39

If the measured circuit current is zero, it is likely that the ________.

A)circuitVoltage isV
Ery high
B)voltage is turned off
C)circuit has a short
D)resistance isV
Ery low

Question 40

Voltage is ________.

A)the force that exists between charged particles
B)the force that causesW
Ater to flow
C)the movement of free electrons
D)the opposition to the flow of current

Question 41

An ohmmeter should ________.

A)be inserted into the circuit so the current flows through it
B)have the polarity carefully checked before its use
C)be connected across a circuitW
Ith the power on
D)be placed across the resistor after the resistor has been disconnected from the circuit

Question 42

On a resistorW ith five bands of color code, the fifth band may represent that:

A)the resistor is a precision resistor.
B)the reliability in percentage of failure.
C)the tolerance in percentage ofV
Alue.
D)all of these.

Question 43

Most DMMsW ill measure ________ ________ and ________.

A)frequency,Voltage, current
B)voltage, current, resistance
C)voltage, frequency, resistance
D)voltage, current, capacitance

Question 44

Every electrical circuit must contain ________.

A)a source, a load and a path
B)a battery, a path and a switch
C)a source, a load and a resistor
D)a battery, a resistor and a capacitor

Question 45

$$\text { Figure } 2 < 2$$

-In Figure 2-2 , the voltage V_CE is the same as________

A) $\mathrm { VR } 3 + \mathrm { VR } 4$
B) $\text { VR6 }$
C) $\mathrm { VR } 4 + \mathrm { VR } 5$
D) $\mathrm { V } _ { \mathrm { R } } 5$

Question 46

In order to measure the current in a circuit, an ammeter must ________.

A)be placed so the current must pass through the meter
B)be placed across the load
C)be placed across the source
D)all of these

Question 47

A 100 $\mathrm { k } Q \pm 10 \%$ resistor is color coded___________

A) brown, black, yellow, gold
B) brown, black, yellow, silver
C) brown, green, black, gold
D) black, brown, yellow, silver

Question 48

$$\text { Figure } 2 - 2$$

-In Figure 2-2, if you place a voltmeter?s red lead on point E and its black lead on point H, youW ill be measuring ________.

A) $\mathrm { VR } 5$
B) $\text { VR6 }$
C) $\text { VR4 }$
D) $\text { VR7 }$

Question 49

Interpret the following mixed numbers and letters 4R7 on a resistor to the correct resistance of:

A)4.7 Kilohms.
B)47 ohms.
C)4.7 Megohms.
D)4.7 ohms.

Question 50

On a resistorW ith four bands of color code, the fourth band represents:

A)the multiplierV
Alue.
B)theVoltage rating.
C)theW
Attage rating.
D)the tolerance percentage.

Question 51

Interpret the following mixed numbers and letters 3M3 on a resistor to the correct resistance of:

A)330 Kilohms.
B)33 Kilohms.
C)3.3 Kilohms.
D)3300 Kilohms.

Question 52

A resistor with yellow, violet, orange and silver bands equals_____

A) $47 \mathrm { k } \Omega \pm 5 \%$
B) $47 \mathrm { M } \Omega \pm 10 \%$
C) $47 \mathrm { k } \Omega \pm 10 \%$
D) $4.7 \mathrm { k } \Omega \pm 10 \%$

Question 53

To measure the current that flows through R6 in Figure 2-2, the circuit must be opened and the ammeter placed at point ________.

A)H
B)G
C)E
D)F

Question 54

$$\text { Figure } 2 < 2$$

-In Figure 2-2 , the voltage $\text { VFG }$ is the same as_______

A) $\mathrm { VR } 9$
B) $\text { VR6 }$
C) $\text { VR8 }$
D) $\text { VR7 }$

Question 55

In Figure 2-2, the voltage V_GH is the same as ________.

A)VR5
B)VR7
C)VR6
D)VR8

Question 56

An analog meter has ________.

A)a digital readout
B)a needle and a scale to indicate theV
Alue
C)a high degree of accuracy
D)no moving parts

Question 57

$$\text { Figure } 2 < 2$$

-In Figure 2-2, a voltmeter placed across points C and D will measure_______

A) $\mathrm { V } _ { \mathrm { R } 3 }$
B) $\mathrm { VR } 1$
C) $\mathrm { VR } 4$
D) $\mathrm { VR } 2$

Question 58

A resistor with yellow, violet, orange, and gold bands equals_______

A) $4.7 \mathrm { k } \Omega \pm 10 \%$
B) $47 \mathrm { M } \Omega \pm 10 \%$
C) $47 \mathrm { k } \Omega \pm 10 \%$
D) $47 \mathrm { k } \Omega \pm 5 \%$

Question 59

If a resistor is color codedW ith orange, orange, orange and silver bands, the resistance equals ________, the lower tolerance limit equals ________ and the upper tolerance limit equals ________.

A)
B)
C)
D)

Question 60

On a resistorW ith numbers and letters, the position of the letter in the sequence represents:

A)the tolerance.
B)the numerical total.
C)the decimal point.
D)the resistanceV
Alue.

Question 61

In the AmericanW ire Gauge sizes, as the numerical value of AWG goes higher, the cross sectional area of theW ire:

A)doubles.
B)halves.
C)increases.
D)decreases.

Question 62

What is the key differenceW hen taking voltage measurementsW ith an analog meter versus a digital meter?

A)where the negative lead is placed
B)proper choice of the scale on the display
C)safety procedure in taking the measurement
D)adjustment of the scale

Question 63

The voltage measured directly across an open switch in a circuitW ill be:

A)unpredictable.
B)half of applied Voltage.
C)0 V
D)full applied Voltage.

Question 64

(a)

(b)

(c)

(d)


Figure $2 - 3$

-What does the schematic symbol (b)represent in Figure 2-3?

A)photoconductive cell
B)rheostat
C)thermistor
D)potentiometer

Question 65

Which type of resistor is used for high power applications?

A)wireW
Ound
B)surface mount
C)carbon composition
D)film

Question 66

Potentiometers and rheostats differ in that:

A)potentiometers utilize linear and nonlinear tapers,wHile rheostats usually utilize only lineartapers.
B)potentiometers utilize three terminals,while rheostats usually use only two terminals.
C)potentiometers are used to vary Voltages,while rheostats vary currents.
D)all of these.

Question 67

A common type of resistors are:

A)carbon-composition.
B)carbon film.
C)metal film.
D)wirewound.

Question 68

(a)

(b)

(c)

(d)


Figure $2 - 3$

-Which of the following is not a type of variable resistor?

A)photoconductive cell
B)thermistor
C)potentiometer
D)All are types ofV
Ariable resistors.

Question 69

The basic difference between a fuse and a circuit breaker is that:

A)a fuse is faster.
B)a circuit breaker is more reliable.
C)a circuit breaker is reusable.
D)a fuse is reusable.