reading this section you will be able to do
amperes and name the instrument that is used to measures amperage.
an experiment to determine the amount of amps flowing in a circuit.
It is very important to have a way
to measure and quantify the flow of electrical current. When current
flow is controlled it can be used to do useful work. Electricity
can be very dangerous and it is important to know something about
it in order to work with it safely. The flow of electrons is measured
in units called amperes. The term amps is often
used for short. An amp is the amount of electrical current that
exists when a number of electrons, having one coulomb (ku`-lum)
of charge, move past a given point in one second. A coulomb
is the charge carried by 6.25 x 10^18 electrons. 6.25 x 10^18
is scientific notation for 6,250,000,000,000,000,000. That is
a lot of electrons moving past a given point in one second!
Since we cannot count
this fast and we cannot even see the electrons, we need an instrument
to measure the flow of electrons. An ammeter is this instrument
and it is used to indicate how many amps of current are flowing
in an electrical circuit.
is a term used to describe the number of electrons moving
past a fixed point in a conductor in one second.
is measured in units called amperes or amps.