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Subelement ZLB
Basic Electrical Theory
Section ZLB03
Electronics Fundamentals
ZLB0301
The element Silicon is
A.
a conductor
B.
an insulator
C.
a superconductor
Correct Answer
D.
a
semiconductor
ZLB0301
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ZLB0302
An element which falls somewhere between being an insulator and a conductor is called a
A.
P-type conductor
B.
intrinsic conductor
Correct Answer
C.
semiconductor
D.
N-type conductor
ZLB0302
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ZLB0303
In an atom
A.
the protons and the neutrons orbit the nucleus in opposite directions
B.
the protons orbit around the neutrons
Correct Answer
C.
the electrons orbit the nucleus
D.
the electrons and the neutrons orbit the nucleus
ZLB0303
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ZLB0304
An atom that loses an electron becomes
Correct Answer
A.
a
positive
ion
B.
an isotope
C.
a negative ion
D.
a radioactive atom
ZLB0304
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ZLB0305
An electric current passing through a wire will produce around the conductor
A.
an electric field
Correct Answer
B.
a
magnetic
field
C.
an electrostatic field
D.
nothing
ZLB0305
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ZLB0306
These magnetic poles repel
A.
unlike
Correct Answer
B.
like
C.
positive
D.
negative
ZLB0306
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ZLB0307
A common use for a magnet is in
Correct Answer
A.
A
computer
speaker
B.
An optical mouse
C.
A keyboard
D.
A magnetic loop antenna
ZLB0307
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ZLB0308
The better conductor of electricity is
Correct Answer
A.
copper
B.
carbon
C.
silicon
D.
aluminium
ZLB0308
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ZLB0309
The term describing opposition to electron flow in a metallic circuit is
A.
current
B.
voltage
Correct Answer
C.
resistance
D.
power
ZLB0309
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ZLB0310
The substance which will most readily allow an electric current to flow is
A.
an insulator
Correct Answer
B.
a
conductor
C.
a resistor
D.
a dielectric
ZLB0310
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ZLB0311
The plastic coating formed around wire is
Correct Answer
A.
an
insulator
B.
a conductor
C.
an inductor
D.
a magnet
ZLB0311
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ZLB0312
The following is a source of electrical energy
A.
p-channel FET
B.
carbon resistor
C.
germanium diode
Correct Answer
D.
lead
acid
battery
ZLB0312
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ZLB0313
An important difference between a common torch battery and a lead acid battery is that only the lead acid battery
A.
has two terminals
B.
contains an electrolyte
Correct Answer
C.
can be re-
charged
D.
can be effectively discharged
ZLB0313
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ZLB0314
As temperature increases, the resistance of a metallic conductor
Correct Answer
A.
increases
B.
decreases
C.
remains constant
D.
becomes negative
ZLB0314
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ZLB0315
In an n-type semiconductor, the current carriers are
A.
holes
Correct Answer
B.
electrons
C.
positive ions
D.
photons
ZLB0315
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ZLB0316
In a p-type semiconductor, the current carriers are
A.
photons
B.
electrons
C.
positive ions
Correct Answer
D.
holes
ZLB0316
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ZLB0317
An electrical insulator
A.
lets electricity flow through it in one direction
Correct Answer
B.
does not let electricity flow through it
C.
lets electricity flow through it when light shines on it
D.
lets electricity flow through it
ZLB0317
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ZLB0318
Four good electrical insulators are
A.
plastic, rubber, wood, carbon
B.
glass, wood, copper, porcelain
C.
paper, glass, air, aluminium
Correct Answer
D.
glass, air, plastic, porcelain
ZLB0318
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ZLB0319
Three good electrical conductors are
A.
copper, gold, mica
B.
gold, silver, wood
Correct Answer
C.
gold, silver, aluminium
D.
copper, aluminium, paper
ZLB0319
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ZLB0320
The name for the flow of electrons in an electric circuit is
A.
voltage
B.
resistance
C.
capacitance
Correct Answer
D.
current
ZLB0320
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