Quiz questions
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What does D.C stand for?
direct current
what does A.C stand for?
alternating current
How many different versions of a.c are there?
single phase and polyphase
D.C has what type of polarities?
positive and negative
what colour is positive terminals?
red
colour of negative terminals?
black
3 major states of matter?
solid liquid gas
what is an element?
A single uncombined substance consisting of one type of atom
What is a compound?
type of atom that contains two or more elements with atoms of more than one type
Amount of electrons in the outter valence?
8
Atoms with 1-3 valence electrons?
Conductors
Atoms with 5-8 valence electrons?
Insulators
Atoms with 4 valence electrons are called what?
Semi-conductors
Smallest unit which an element can be broken down?
atom
What is the smallest unit which a substance can be broken down?
molecule
3 ways in which a body may receive a charge?
conduction, induction, and friction
Negatively charged atom?
Ion
A positive charged atom?
cation
how is piezoelectricity produced?
applying pressure
how is photovoltaic electricity produced?
by light
How is triboelectricity produced?
by friction
how is electrochemical electricity produced?
by chemical means
How is thermoelectrical electricity produced?
produced by heat
How is magnetoelectrical electricity produced?
produced by magnetism