Deck 2: Voltage, Current, and Resistance

Question 1

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

Answer 1

True

Question 2

A downside of using deep -cycle batteries is

A)they are inefficient
B)they are expensive
C)they require regular maintenance
D)all of the above

Answer 2

all of the above

Question 3

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

Answer 3

True

Question 4

Electromotive force is measured in volts.

Question 5

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

Question 6

A Normally Open Push Button switch can carry current when not pushed.

Question 7

An insulator is a material with .

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

Question 8

Resistance is the opposition to the flow of current.

Question 9

A SPST switch is used to control one circuit.

Question 10

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

A)33 kΩ ±5%
B)3.3 kΩ ±10%
C)3.3 kΩ ±5%
D)33 kΩ ±10%

Question 11

The ohm is the basic unit of resistance.

Question 12

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

Question 13

Electrons have a positive charge.

Question 14

The movement of free electrons through a conductor is called current.

Question 15

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

Question 16

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

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

Question 17

Electrons attract each other.

Question 18

Electrolysis

A)is a chemical reaction
B)can result from splicing two wires of different materials
C)can produce a high -resistance connection
D)all of the above

Question 19

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

Question 20

A generator converts electrical energy into mechanical energy.

Question 21

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 kΩ, 20.9 kΩ, 23.1 kΩ
B)22 kΩ, 21.5 kΩ, 22.4 kΩ
C)22 kΩ, 19.8 kΩ, 24.2 kΩ
D)22 kΩ, 17.6 kΩ, 26.4 kΩ

Question 22

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 23

The opposition to the flow of current is called .

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

Question 24

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

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

Question 25

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

A)a selector for different voltages in a power supply.
B)a range selector switch in an analog voltmeter.
C)an old manual TV channel selector.
D)all of the above

Question 26

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

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

Question 27

Which unit of charge contains 6.25 × 1018 electrons?

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

Question 28

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 29

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 30

Which switch in Figure 2 -1 would 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 31

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 32

Identify the DPST switch in Figure 2 -1.

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

Question 33

Identify the Rotary switch in Figure 2 -1.

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

Question 34

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 35

A source, a path, and a load _ .

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

Question 36

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 37

Identify the DPDT switch in Figure 2 -1.

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

Question 38

What do you call a diagram that shows the electrical connections of a circuit's components?

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

Question 39

To measure a circuit's source voltage, the voltmeter must .

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

Question 40

Voltage is .

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

Question 41

if you place a voltmeter's red lead on point E and its black lead on point H, you will be measuring .

A)VR5
B)VR7
C)VR4
D)VR6

Question 42

On a resistor with four bands of color code, the fourth band represents:

A)the multiplier value.
B)the wattage rating.
C)the tolerance percentage.
D)the voltage rating.

Question 43

A resistor with yellow, violet, orange and silver bands equals .

A)47 kΩ ± 10%
B)47 MΩ ± 10%
C)4.7 kΩ ± 10%
D)47 kΩ ± 5%

Question 44

the voltage VCE is the same as .

A)VR5
B)VR6
C)VR4 + VR5
D)VR3 + VR4

Question 45

the voltage VGH is the same as .

A)VR7
B)VR6
C)VR5
D)VR9

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 source
C)be placed across the load
D)all of these

Question 47

On a resistor with numbers and letters, the position of the letter in the sequence represents:

A)the numerical total.
B)the resistance value.
C)the decimal point.
D)the tolerance.

Question 48

An ohmmeter should .

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

Question 49

A 100 kΩ ±10% resistor is color coded .

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

Question 50

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

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

Question 51

Most DMMs will measure _ _ and _.

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

Question 52

An analog meter has .

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

Question 53

A resistor with yellow, violet, orange, and gold bands equals .

A)47 MΩ ± 10%
B)4.7 kΩ ± 10%
C)47 kΩ ± 10%
D)47 kΩ ± 5%

Question 54

On a resistor with five bands of color code, the fifth band may represent that:

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

Question 55

the voltage VFG is the same as .

A)VR9
B)VR8
C)VR6
D)VR7

Question 56

A conductor is a material that has .

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

Question 57

If a resistor is color coded with orange, orange, orange and silver bands, the resistance equals , the lower tolerance limit equals and the upper tolerance limit equals .

A)33 kΩ, 29,700 Ω, 36,300 Ω
B)33 kΩ, 31,350 Ω, 34,650 Ω
C)33 kΩ, 26,400 Ω, 39,600 Ω
D)33 kΩ, 32,670 Ω, 33,330 Ω

Question 58

If a resistor equals 1.2 Ω ±5%, its color code is _.

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

Question 59

Every electrical circuit must contain .

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

Question 60

a voltmeter placed across points C and D will measure .

A)VR3
B)VR4
C)VR2
D)VR1

Question 61

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

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

Question 62

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

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

Question 63

The voltage measured directly across an open switch in a circuit will be:

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

Question 64

Potentiometers and rheostats differ in that:

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

Question 65

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

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

Question 66

What is the key difference when taking voltage measurements with an analog meter versus a digital meter?

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

Question 67

A common type of resistors are:

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

Question 68

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

A)thermistor
B)photoconductive cell
C)potentiometer
D)All are types of variable resistors.

Question 69

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

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

Question 70

Which type of resistor is used for high power applications?

A)carbon composition
B)wire wound
C)surface mount
D)film

Question 71

In the American Wire Gauge sizes, as the numerical value of AWG goes higher, the cross sectional area of the wire:

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