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Delmar,, questions and answers already passed 2024
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Delmar's Textbook of Electricity, Section1, Units 1 - 5
Alternating Current (AC) - correct answer ✔Source of electricity where the
flow is bidirectional.
Atom - correct answer ✔Basic building block of the universe. Smallest part of
an element. Made of a proton, electron, and neutron.
Photon - correct answer ✔A massless particle of pure energy. Produced
when electrons move from one energy level to another.
Atomic Number - correct answer ✔The number of protons in an element.
Attraction - correct answer ✔Unlike charges such as positive to negative
Bidirectional - correct answer ✔Reverses direction of flow at regular intervals
Conductor - correct answer ✔Material that contains 1-3 valence electrons
allowing electrons t flow through them easily. Heat causes their resistance to
increase.
Direct Current - correct answer ✔Source of electricity that is unidirectional.
Electron - correct answer ✔The negative charged part of an atom.
Electron Orbit - correct answer ✔The outer shell of an atom. There are
multiple orbits.
,Element - correct answer ✔A substance that cannot be chemically divided
into two or more simpler substances.
Insulators - correct answer ✔Materials that resist the flow of energy.
Materials that contain 7-8 valence electrons.
Matter - correct answer ✔Any substance that has mass and occupies space.
Made from a combination of atoms.
Molecules - correct answer ✔Combinations of atoms to make a compound or
substance.
Negative - correct answer ✔A term used to designate lines of force coming
inward.
Neutron - correct answer ✔The part of an atom that has no charge
Nucleus - correct answer ✔Combination of protons and neutrons at the
center of an atom
Positive - correct answer ✔A term used to designate the lines of force
extending outward.
Proton - correct answer ✔The positive part of an atom.
Repulsion - correct answer ✔Similar charges such as Positive to positive or
negative to negative
, Semiconductors - correct answer ✔A material that is neither a good
conductor or a good insulator. Contains 4 valence electrons and as they are
heated, their resistance decreases.
Unidirectional - correct answer ✔Flow in one direction
Valence Electrons - correct answer ✔Electrons in the outermost shell of an
atom.
6 methods of producing electricity - correct answer ✔1) Magnetism
2) chemical action
3) pressure
4) heat
5) friction
6) light
5 Electrical Effects - correct answer ✔1) magnetism
2)chemical reactions
3) pressure
4) heat
5) light
Law of Charges - correct answer ✔Opposite charges attract and like charges
repel.
Ampere (A) - correct answer ✔A quantity of electrons (coulomb) per second.
(1C/second=1A) or (I=q/t)
Also known as Intensity of current
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