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Solid State > Test 1 > Flashcards

Test 1 Flashcards

1
Q

A ___ is an electronic component that allows electrons to pass through it in only one direction.

A

Diode

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2
Q

The two most common semiconductor materials used to make diodes are silicon and ___.

A

Germanium

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3
Q

___ is the addition of impurities to the crystal structure of a semiconductor to allow electron flow.

A

Doping

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4
Q

___ - type material is semiconductor material created by doping a region of a crystal with atoms of an element that has more electrons in its outer shell.

A

N

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5
Q

___ voltage is voltage applied with polarity that allows a diode to act as a conductor.

A

Forward-bias

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6
Q

When a diode is ___, the polarity of the voltage sources causes the free electrons and holes to move away from the depletion region.

A

Reverse-bias

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7
Q

___ current is the current range in which a semiconductor can safely operate once it reaches forward breakover voltage.

A

Forward operating currnet

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8
Q

___ voltage is the maximum reverse-bias voltage that a diode can withstand.

A

Peak Inverses

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9
Q

___ is the flow of electrons when a diode breaks down and allows electrons to pass freely, which can damage the diode.

A

Avalanche current

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10
Q

Externally, the polarity of a DMM may be identified by a color-coding system – usually ___ for positive and black for negative.

A

Red

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11
Q

___ is the act of operating a diode at less than maximum operating current.

A

Derating

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12
Q

Diode applications include ___.

A

Rectifiers, Clipping circuits, and Clamping.

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13
Q

A ___ is a device consisting of diodes that convert AC power to DC power by allowing electrons to flow in only one direction.

A

Rectifier

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14
Q

A ___ is a circuit containing an AC source, a load resistor, and a diode that permits only the positive half-cycles of the AC sine wave to pass creating pulsating DC.

A

Half-wave Rectifier

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15
Q

A ___ is an electronic circuit that consists of diodes used to control voltage when large voltage changes are expected.

A

Voltage Limiter

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16
Q

A diode ___ circuit can be used when a reference level other than zero is needed.

A

Clamping

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17
Q

The overall forward and reverse characteristics of a ___ are similar to that of a standard diode.

A

Zener Diode

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18
Q

The standard zener breakdown voltage tolerance is +/- ___%.

A

5, 10, and 20.

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19
Q

Zener diode applications include ___.

A

Voltage regulators, oscilloscope calibration, clipping and limiting.

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20
Q

Resistor ___ establishes the basic zener test current.

A

RL

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21
Q

Thermionic diodes are the most widely used diodes because of their small size and weight.

A

F

22
Q

Some elements commonly used for creating P-type material are phosphorus, arsenic, bismuth, and antimony.

A

F

23
Q

Holes are the missing electrons in a crystal structure.

A

T

24
Q

Typical elements used for doping a crystal to create N-type material are boron, gallium, and indium.

A

F

25
Q

Diodes have the ability to block electron flow in one direction and pass electrons in the opposite direction.

A

T

26
Q

A diode has a relatively high resistance in the forward-bias direction and a low resistance in the reverse-bias direction.

A

F

27
Q

A diode characteristic curve indicates the response of a diode when subjected to different forward- and reverse-bias voltages.

A

T

28
Q

Once the depletion region is closed, resistance across the diode is very low and current increases rapidly.

A

T

29
Q

A replacement diode should have at least the same forward current rating as the original diode.

A

T

30
Q

In most cases, diodes are tested with a digital multimeter (DMM).

A

T

31
Q

Diode testing includes determining the quantity of P-type and N-type material.

A

F

32
Q

A DMM set to measure voltage can be used to determine which end of a diode is the cathode and which end is the anode.

A

F

33
Q

The best way to test a diode is to measure the voltage drop across the diode when it is reverse-biased.

A

F

34
Q

A DMM in the diode test mode is used to test the voltage drop across a diode.

A

T

35
Q

A closed diode does not allow electrons to flow through it in either direction.

A

F

36
Q

To ensure that diodes operate properly, they should not be overloaded, even momentarily.

A

T

37
Q

The maximum current at which a diode may operate in a normal environment is limited primarily by the temperature rise at the PN junction.

A

T

38
Q

By connecting a diode in parrallel, it can bypass potentially damaging currents.

A

T

39
Q

DC power must be converted to AC power before it can be used to operate electronic devices.

A

F

40
Q

A half-way rectifier can affect AC voltage by rectifying or cutting out the negative output voltage.

A

T

41
Q

During the clipping process, the diode should not significantly change the shape of a waveform.

A

F

42
Q

The main function of a clamper is to provide a DC reference level for a signal voltage.

A

T

43
Q

The operation of a zener diode is best understood through the us of a characteristic curve.

A

T

44
Q

A capacitive diode is capable of being a constant voltage source because of the resistance changes that take place within the PN junction.

A

F

45
Q

When a zener diode is rated at a specific voltage, it is not necessarily the same value of voltage that begins to cause the diode to break down.

A

T

46
Q

A zener diode is designed to have a specific breakdown voltage rating.

A

T

47
Q

The most popular zener diodes are those rated a 1 W larger.

A

F

48
Q

A zener diode does not provide voltage regulation.

A

F

49
Q

Load changes affect the zener diode as a regulator.

A

F

50
Q

Always connect a ground between test equipment and a circuit with semiconductors before attempting to inject or monitor a signal.

A

T

Solid State (3 decks)

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