Deck 1: Introduction to Electronics

Question 1

How much forward diode voltage is there with the ideal- diode approximation?

A)0.7 V
B)0 V
C)1 V
D)More than 0.7 V

Answer 1

B

Question 2

On diode check, a shorted diode will measure

A)0 V.
B)0.7 V.
C)0.3 V.
D)0.79 V.

Answer 2

A

Question 3

A DMM measures 0.13 ▲ in both directions when testing a diode. The diode is

A)open.
B)shorted.
C)operating normally.
D)constructed of Si and is good.

Answer 3

B

Question 4

Silicon and germanium contain valence electrons.

A)one
B)two
C)four
D)eight

Question 5

The valence electron of a copper atom experiences what kind of attraction toward the nucleus?

A)Strong
B)Weak
C)None
D)Impossible to say

Question 6

A nonconducting diode is biased.

A)forward
B)inverse
C)reverse
D)poorly

Question 7

Holes are the majority carriers in

A)a pn junction semiconductor.
B)an n-type semiconductor.
C)a p-type semiconductor.
D)None of the above.

Question 8

Valence electrons have energy level of all the electrons in orbit around the nucleus of a given atom.

A)the lowest
B)the same
C)the highest
D)None of the above.

Question 9

Germanium has limited use in modern electronics due to

A)shortages of raw materials.
B)high temperature instability.
C)filament warm- up time.
D)higher forward voltage drop when compared to Si.

Question 10

Electrons orbiting the nucleus of an atom are grouped into energy bands known as

A)shells.
B)slots.
C)tunnels.
D)tracks.

Question 11

Semiconductor materials are those with

A)no conductive properties.
B)conductive properties that are very good.
C)conductive properties that are in between those of a conductor or an insulator.
D)Either A or B.

Question 12

The boundary between p-type material and n- type material in a diode is called

A)the control grid.
B)the anode.
C)the pn junction.
D)the cathode.

Question 13

The atomic number of an atom refers to the

A)number of protons in the nucleus.
B)number of neutrons in the nucleus.
C)net electrical charge of the atom.
D)number of electrons in a charged atom.

Question 14

All of the following are semiconductors except

A)carbon.
B)silicon.
C)copper.
D)germanium.

Question 15

Which statement best describes a p-type semiconductor?

A)Silicon with trivalent impurity atoms added.
B)Silicon with pentavalent impurity.
C)A material where holes are the minority carriers.
D)Pure intrinsic silicon.

Question 16

The difference in energy levels that exists between the valence band and the conduction band is called

A)energy gap.
B)semiconductor region.
C)spark gap.
D)covalent gap.

Question 17

If the positive lead of an ohmmeter is placed on the cathode and the negative lead is placed on the anode, which of the following readings would indicate a defective diode?

A)œ ▲
B)400 k▲
C)0 ▲
D)1 M▲

Question 18

What is the maximum number of electrons that can exist in the shell closest to the nucleus of an atom?

A)1
B)2
C)4
D)8