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Electronics > Terms - Prelims > Flashcards

Terms - Prelims Flashcards

1
Q

a reverse-biased diode acts like a(n)

A

open switch

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2
Q

the arrow in the schematic symbol for a diode point which way?

A

in the direction of current flow

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3
Q

the forward bias a diode

A

an external voltage is applied positive at the anode (p-region) and negative at the cathode (n-region)

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4
Q

the cathode of a semiconductor diode indicates a _______ charge during conduction

A

negative

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5
Q

an electronic device that allows an electric current to flow in one direction

A

diode

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6
Q

electron collector

A

anode

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7
Q

an electronic switch allows or prevents the flow of the current in a circuit

A

diode

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8
Q

what does a high resistance reading in both foward and reverse-bias directions indicate?

A

open diode

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9
Q

in a semiconductor diode, the depletion region is removed when

A

the diode is in its forward conducting state

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10
Q

type of diode that is made of metal whisker touching a very small conductor die

A

point contact diode

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11
Q

refers to the majority carrier in an N-type semiconductor

A

electron

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12
Q

how many does an ohmmeter behave if its positive lead is connected to the cathode of a diode while negative to anode?

A

has infinite high resistance

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13
Q

as you increase the doping level of a crystal diode, its voltages

A

increases

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14
Q

how many diodes will you use in designing a half-wave rectifier power supply?

A

one

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15
Q

how does zener diodes widely used?

A

voltage regulators

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16
Q

when the diode is in its non-conducting state, it has

A

a very high resistance

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17
Q

the process of converting AC input to AC output to DC output

A

rectification

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18
Q

the output of a half-wave rectifier

A

half-wave rectified signal

19
Q

a half-wave rectifier circuit utilizing one half of an ac input cycle hacve a ripple frequency in its output equivalent to

A

60 cps

20
Q

an amplifier with an input resistance of 600 ohms has an input current of 500 uA. It delivers 100 mA to a 1000-ohm load. Calculate the dB gain of the amplifier

A

48.2 dB

21
Q

Reducing the plate and screen-grid voltage of an amplifier will ______ control grid cut-off voltage

A

increase

22
Q

the zone in a semiconductor diode where no free charge carriers exist is known as

A

depletion region

23
Q

the process in which the DC level is obtained frm sinusoidal input can be improved 100%

A

Full-wave rectification

24
Q

the valence electron of a conductor is also called as

A

free electron

25
Q

valence electrons are

A

in the most distant orbit from the nucleus

26
Q

an atom consists of

A

one electron, proton and neutron (both inside one nucleus)

27
Q

part/s of an atom that causes current

A

electrons

28
Q

semiconductors that have been carefully refined to reduce the impurities to a very low level as pure as can be made available through modern technology

A

Intrinsic Materials

29
Q

semiconductors that are subjected through a process known as “doping”

A

Extrinsic Materials

30
Q

process of adding of impurities to a pure semiconductor material to change their electrical properties

A

Doping

31
Q

Elements that are dopant, p-type doping

A

Boron and gallium

32
Q

Acceptor impurity creates

A

a hole

33
Q

Examples of Donor, N-types

A

Phosphorus and Arsenic

34
Q

Examples of Donor, N-types

A

Phosphorus and Arsenic

35
Q

Donor impurity contributes

A

free electrons

36
Q

p-type material formed by doping an

A

trivalent impurities

37
Q

n-type material formed by doping

A

pentavalent impurities

38
Q

in p-type materials, holes are

A

major carrier

39
Q

in n-type materials, electrons are

A

major carriers

40
Q

donor-doped semiconductor becomes a

A

N-type semiconductor

41
Q

if you wanted to produce a p-type semiconductor, what would you use?

A

acceptor atoms

42
Q

the purpose of pentavalent impurity is to

A

increase the number of electrons

43
Q

majority carriers in an n-type semiconductor are

A

conduction electrons

Electronics (1 decks)

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