Deck 2: Voltage, Current, and Resistance

Question 1

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)
B)
C)
D)

Answer 1

Question 2

The opposition to the flow of current is called ________.

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

Answer 2

resistance

Question 3

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

Answer 3

True

Question 4

Electrons attract each other.

Question 5

A generator converts electrical energy into mechanical energy.

Question 6

An insulator is a material with ________.

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

Question 7

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

Question 8

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

Question 9

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

Question 10

Electrons have a positive charge.

Question 11

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

Question 12

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

Question 13

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

A)
B)
C)
D)

Question 14

A SPST switch is used to control one circuit.

Question 15

Resistance is the opposition to the flow of current.

Question 16

Electromotive force is measured in volts.

Question 17

The ohm is the basic unit of resistance.

Question 18

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

Question 19

To measure the current through a resistor, place the ammeter so the current must pass through the 5)
meter.

Question 20

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

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

Question 21

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 22

If a resistor equals , 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 23

Identify the DPDT switch in Figure 2-1.

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

Question 24

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 25

Voltage is ________.

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

Question 26

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 27

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

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

Question 28

Which unit of charge contains

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

Question 29

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 30

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 31

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 32

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 33

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 34

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 35

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 36

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 37

Identify the Rotary switch in Figure 2-1.

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

Question 38

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 39

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 40

Identify the DPST switch in Figure 2-1.

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

Question 41

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 42

On a resistor with 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 resistance value.

Question 43

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 44

An analog meter has ________.

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

Question 45

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 46

In Figure 2-2, if you place a voltmeterʹs red lead on point E and its black lead on point H, you will be measuring ________.

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

Question 47

On a resistor with 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 of value.
D)all of these.

Question 48

To measure the current that flows through ammeter placed at point ________.

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

Question 49

In Figure 2-2, a voltmeter placed across points C and D will measure ________.

A)
B)
C)
D)

Question 50

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 51

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 circuit with the power on
D)be placed across the resistor after the resistor has been disconnected from the circuit

Question 52

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

A)
B)
C)
D)

Question 53

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

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

Question 54

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 55

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)
B)
C)
D)

Question 56

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

A)
B)
C)
D)

Question 57

Most DMMs will measure ________ ________ and ________.

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

Question 58

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

A)
B)
C)
D)

Question 59

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

A)
B)
C)
D)

Question 60

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

A)
B)
C)
D)

Question 61

Potentiometers and rheostats differ in that:

A)potentiometers utilize linear and nonlinear tapers, while rheostats usually utilize only linear tapers.
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 62

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)proper choice of the scale on the display
C)safety procedure in taking the measurement
D)adjustment of the scale

Question 63

A common type of resistors are:

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

Question 64

Which type of resistor is used for high power applications?

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

Question 65

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

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

Question 66

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.

Question 67

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

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

Question 68

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

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

Question 69

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

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