AP Physics 2: 1.2 Systems Interactions and Changes
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AP Physics 2: 1.2 Systems Interactions and Changes. What's the approximate magnitude of the charge on each plate?
AP Physics 2 | Systems Interactions and Changes |
Language | English Language |
Science Practice 2 | Using math appropriately |
Transcript
really looks like All right Well a pheromone is an
electronic musical instrument played without any direct contact It makes
a rather a spooky sound that look no hands but
one of the players hands act as a capacitor plate
while an antenna on the instrument provides the other plate
as the distance between the hand and the antenna changes
The capacitance between them also changes this intern affect the
frequency of the sound treat The thurman system is a
simple parallel plate capacitor Take a look at the following
diagram Here we go Each plate is a square with
sides of twenty one point three centimeters separated from each
other by a distance of ten centimetres A constant potential
difference of one hundred twenty volts has maintained between the
plates What's the approximate magnitude of the charge on each
plate And here the potential answers All right Well whether
we're dealing with a somewhat dorky musical instrument or just
too boring electric plates There's an equation to determine capacitance
in this situation thea capacitance of a parallel plate capacitor
equals the electric constant times the area of one of
the plates divided by the distance between the plates to
make things easier for us which we try to do
in all circumstances let's use multiples of ten for the
area and the electric constant Well the area will equal
twenty centimeters squared or twenty times ten to the negative
second meters The distance is ten centimetres a ten to
the negative two meters The electric constant equals ten times
ten to the negative twelve And when we flug in
the numbers into our equations we find that the capacitance
equals for pico farrah capacitance equals charge over voltage which
means that charge equals voltage times capacities while for pico
frauds times one hundred twenty volts gives us a charge
of four hundred eighty pico coolant on the correct answer
is a when we're dealing with capacitance we're going to
be seeing these super tiny numbers It'll be pico and
nano for rods all over the place But that's enough
Math We need to get another jam sesh going with
the fireman way Need to feel the music in our
bones or in this case we need to feel the
voltage in our fingers with a great sound like that
It's Hard to believe the thurman really never caught on 00:02:38.745 --> [endTime] No