electrical & electronics Flashcards
an atom consist of what 3 things?
neutrons, protons and electrons
an element is made up of what?
made of one kind of atom
what happens when 2 or more elements combine
compound is formed
inside of a nucleus of an atom contains what?
1) electrons
2) proton
3) neutron
contains both protons & neutrons
what goes with what
1) protons A. neutral
2) electrons B. positive
3) neutrons C. negative
1) protons are B. positive
2) electrons are C. negative
3) neutrons are A. neutral
what 3 out of 4 orbits are important?
first orbit with 2 electrons
second orbit with 8 electrons
third orbit that has 18 electrons
when an atom losses an electron it becomes?
positive charge
when an atom losses a proton it becomes?
negative charged
what is the valence orbit referring to?
the outermost obit & is where an atom losses or gains electrons
insulators are usually made up of?
plastic, rubber & oil
what makes up a hydrocarbon?
compound of hydrogen atom & carbon atoms
when are varnish insulators used?
used on components such as alternators, starters or anything with tightly wound copper coils
semiconductors have how many valence electrons?
they have 4 electrons in furthest orbit
voltage may be referred to as
electromotive force, or is the pressure or force causing electrons to flow
current is measured by?
amps
