QUESTIONS WITH VERIFIED ANSWERS
GRADED A+
◉ The orbital shell that has a maximum electron capacity of 18 electrons
is the ___________ shell. Answer: Third
◉ A semiconductor material Answer: Has four valence electrons.
◉ The major factor for determining whether a particular element is a
conductor, a semiconductor, or an insulator is Answer: The number of
electrons in the valence shell.
◉ Elements that are called conductors Answer: Have very few valence
electrons.
◉ The term voltage normally refers to Answer: The measurement of the
difference in potential between two charges.
◉ The ampere Answer: Indicates how many coulombs pass a given
point during 1 second.
,◉ Electric current is actually produced by Answer: The transfer of
energy from valence electron to valence electron as a result of applied
charges.
◉ What prevents the electrons that orbit an atom's nucleus at high
speeds from breaking away from the nucleus due to centrifugal force?
Answer: The attraction between the positive nucleus and the negative
electron.
◉ 5 kilovolts is the same as Answer: 5 kV.
◉ To create an electromagnet, Answer: Wrap a coil of insulated wire
around an iron bar and pass an electric current through the wire.
◉ Magnetism Answer: Was discovered when the Greeks noticed that
magnetite always aligned itself in a north and south direction.
◉ In a magnetic material, Answer: Where only some of the magnetic
domains are pointing in the same direction, the magnetic field is weaker.
◉ The strength of an electromagnetic field is Answer: Determined by
the magnitude of the magnetomotive force (mmf).
◉ The magnetic field Answer: Created by a straight piece of wire is
weaker than that created by forming loops of wire.
, ◉ Flux lines Answer: Always curve around through the body of the
magnet to form complete loops.
◉ Magnetic poles that are ___________ will ____________ each other
when those poles are near each other. Answer: Alike, repel
◉ A permanent-magnet loudspeaker Answer: Has a cone that moves
back and forth in relation to the varying current of the original sound.
◉ The left-hand rule for electromagnetism in a wire states that Answer:
If you wrap the fingers of your left hand around the wire with your
thumb pointing in the direction of the current flow, your fingers will be
wrapped in the direction of the magnetic field.
◉ The recording head of a tape recorder is actually a(an) Answer:
Electromagnet.
◉ (-25) + (42) + (-62) + (20) = Answer: -25
◉ (-17) - (-34) = Answer: 17
◉ (17) x (-19) = Answer: -323