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4th Period Electronics SAIT Alberta Electrician > Rect & Batt Charge Part 1 > Flashcards

Rect & Batt Charge Part 1 Flashcards

1
Q

The value of DC that is the mathematical sum of all the instantaneous values recorded at even intervals over a fixed period is called the

A

Average value

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2
Q

How may electrical degrees is one cycle?

A

360 degrees

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3
Q

What is the formula for calculating the period of a sine wave?

A

T = 1/f

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4
Q

What is another name for effective value?

A

RMS value

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5
Q

What is the exponent number for using the prefix expression of nano?

A

10 ^ -9

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6
Q

How do you test to see if an Ohmeter is working properly?

A

Touch the two leads together to verify operation

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7
Q

What are the two types of ammeters?

A

Clamp-on and series

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8
Q

The ammeter has an ideal resistance of how many ohms?

A

Zero

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9
Q

Oscilloscopes show what values on what axis?

A

Time is horizontal and voltage is the amplitude (vertical)

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10
Q

The electrons of one atom pairing up with those of neighbouring atoms in a semi conductor material is called

A

Covalent bonding

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11
Q

Insulators have how many valence electrons

A

Five to eight

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12
Q

Semiconductors have four valence electrons and Are referred to as what elements

A

Tetravalent

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13
Q

Once intrinsic material has been doped, the result is what sort of material?

A

Extrinsic

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14
Q

Doping silicon with pentavalent materials such as Arsenic, Phosphorus or Antimony makes what sort of semiconductor material?

A

N - Type

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15
Q

P Type semiconductor material is made by doping silicon with what materials?

A

Trivalent

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16
Q

Electrons are referred to as majority charge carriers in N-Type semiconductor material, whereas the majority charge carriers in P-Type material are :

A

Holes

17
Q

What is a metal oxide varistor?

A

It filters out voltage spikes that can occur on the ac supply. eg: surge protectors

18
Q

The lead connected to the P-Type Material is called..

A

an Anode

19
Q

A diode only allows current to flow if the anode is positive with respect to the cathode with sufficient voltage. This diode is called a

A

Forward Bias Diode

20
Q

The maximum amount of reverse voltage that can be applied to a diode is call what?

A

Reverse Bias Limit, Voltage Repetitive Reverse Maximum (Vrrm), peak inverse voltage (PIV) or peak reverse voltage (PRV)

21
Q

Heat sinks are mounted vertically to make use of what effect

A

Chimney

22
Q

Diodes in the 150A to 500A range are usually

A

Stud mounted with pigtail, press fit, known as medium current diodes

23
Q

What is a freewheeling diode also known as?

A

Suppression or protection diode

24
Q

Diodes that block current and provide battery isolation to prevent one load from discharging both batteries are called

A

Isolating or Blocking diodes

25
Q

A photodiode allows a small current to flow when ______ ______ is applied

A

When “NO LIGHT” is applied , called Dark current

26
Q

LEDs are usually made of

A

Gallium Arsenic Phosphate (GaAsP) or Gallium Phosphate (GaP)

27
Q

Most common application of a diode is called a

A

Rectifier diode

28
Q

The electrons of one atom pairing up with those of neighbouring atoms in a semi conductor material is called Covalent Bonding and creates what structure?

A

A semiconductor crystal lattice structure

29
Q

How long is an alternation?

A

180 degrees or half of 1 cycle

30
Q

Describe hole flow.

A

Positive to negative. Also known as Conventional Flow.

31
Q

Describe Conventional Flow.

A

Positive to negative. Also known as Hole flow.

32
Q

Describe Electron Flow.

A

Negative to Positive.

33
Q

What is another name for the Barrier Region in a diode?

A

Depletion Region.

34
Q

Hole Flow is from Negative to Positive. T or F?

A

False. Hole Flow is from Positive to Negative.

35
Q

Hole Flow is from Positive to Negative. T or F?

A

True.

36
Q

Electron Flow is from Negative to Positive. T or F?

A

True

37
Q

How many Valence Electrons does Copper have?

A

1

4th Period Electronics SAIT Alberta Electrician (8 decks)

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