What are VOLTs, OHMs & AMPs?
Summary
TLDRThe video explains the concept of voltage, comparing it to electrical pressure and using relatable analogies like magnets and springs to describe how electrons behave. The speaker emphasizes the force between negatively charged electrons, explaining that this tension creates voltage. Through clear examples, like a battery and circuits, the video covers how voltage, current, and resistance work together to power devices. It also highlights Ohm's Law as a principle that connects these concepts, debunking the idea that it's purely a mathematical equation.
Takeaways
- 🔋 Voltage is often misunderstood as electrical pressure, which can be likened to the force that pushes electrons through a wire.
- ⚛️ Electrons are negatively charged particles that move through a wire, creating electricity.
- 🧲 The analogy of magnets helps explain electron behavior; like poles repel, and unlike poles attract, which is similar to how electrons with the same charge repel each other.
- 💡 The force between electrons is visualized as a compressed spring, representing the tension or high voltage when they are forced close together.
- 🔌 A battery can be thought of as a box of electrons under pressure, all trying to move away from each other, which is the source of voltage.
- 🔄 The concept of a circuit being a 'circle' provides a path for electrons to move, and when a switch is closed, it initiates the flow of electrons, or current.
- 🏎 The movement of electrons through a circuit, when unimpeded by a load, is referred to as current.
- 🛠 Resistance, measured in ohms, is the property of a material that opposes the flow of electric current, preventing fuses from blowing.
- ⚙️ Ohm's law is a principle that describes the relationship between voltage, current, and resistance, rather than just a mathematical formula.
- 🔧 The function of a resistor or any resistance in a circuit is to limit the current flow, thus protecting the circuit from damage.
Q & A
What is voltage and how is it related to electrical pressure?
-Voltage is often described as electrical pressure. It is the force that pushes electrons through a conductor, similar to how pressure in a hydraulic system pushes fluid through pipes. The higher the voltage, the greater the force that pushes the electrons.
How are electrons described in the context of this script?
-Electrons are described as negatively charged particles that spin around the outside of an atom and are responsible for the flow of electricity. They are personified as having a 'negative attitude' to help conceptualize their charge.
What is the analogy used to explain the repulsion between like-charged particles?
-The analogy used is that of magnets, where like poles repel each other. This is applied to electrons, which all have a negative charge, and thus repel each other, creating a force that pushes them apart.
How is the force between electrons visualized in the script?
-The force between electrons is visualized as a spring between two billiard balls on a pool table. The more the balls (electrons) are pushed together, the greater the tension in the spring (electrical tension), which corresponds to higher voltage.
What is the term used to describe the force that pushes electrons apart due to their negative charges?
-The term used to describe this force is 'electrical tension' or 'high tension electricity,' which is a result of the repulsion between like-charged particles.
How does the concept of a battery relate to the idea of voltage?
-A battery is a collection of electrons with negative charges that are all trying to get away from each other, creating pressure. This pressure is what generates voltage, which is then used to power electrical devices.
What is the significance of closing a switch in an electrical circuit?
-Closing a switch completes the circuit, allowing the flow of electrons (current) to begin. This movement of electrons is what powers devices and is facilitated by the voltage present in the circuit.
What is the role of resistance in an electrical circuit?
-Resistance in an electrical circuit acts to oppose the flow of current. It is measured in ohms and is essential for controlling the flow of electricity and preventing damage to components, such as preventing fuses from blowing.
Who is credited with the concept of resistance in electrical circuits?
-George Simon Ohm is credited with the concept of resistance, which is why the unit of measurement for resistance is named the ohm.
What is the relationship between voltage, current, and resistance as described in the script?
-Voltage (pressure) pushes current (amperage) through a resistance. This relationship is encapsulated in Ohm's Law, which is described as a concept rather than just a mathematical equation in the script.
How is Ohm's Law presented in the script?
-Ohm's Law is presented as a fundamental concept that explains how voltage, current, and resistance interact, rather than just a mathematical formula. It is the principle that voltage is the pressure that pushes current through a resistance.
Outlines
🔋 Understanding Voltage Through Electrons and Magnets
This paragraph delves into the concept of voltage by likening it to pressure. It explains that electrons, which are negatively charged particles, move through a wire and are responsible for the flow of electricity. The analogy of magnets is used to help understand how electrons, having the same negative charge, repel each other, creating a force akin to the tension in a compressed spring. This tension is what drives the movement of electrons and is referred to as electrical tension or high voltage. The paragraph emphasizes the importance of understanding voltage as it is a measure of electrical pressure that is crucial for the functioning of electrical components.
🔌 The Dynamics of Electricity in a Circuit
The second paragraph explains how connecting a battery to a circuit initiates the flow of electrons, which are under pressure to move away from each other. It uses the term 'circuit' to describe the circular path that electricity takes. The paragraph discusses the concept of static voltage, where electricity is stable and not moving until a switch is closed, allowing the flow of current. It also touches on the role of resistance in a circuit, measured in ohms, and its purpose to prevent fuses from blowing by limiting the flow of current. The paragraph concludes by summarizing Ohm's law as a concept that describes how voltage (pressure), current (movement of electrons), and resistance interact to power electrical devices.
Mindmap
Keywords
💡Voltage
💡Electron
💡Magnet
💡Electrical Tension
💡Battery
💡Circuit
💡Current
💡Resistance
💡Ohm's Law
💡Static Voltage
💡Back EMF
Highlights
Voltage is described as electrical pressure, analogous to physical pressure.
Electrons are the negatively charged particles that move through a wire, making electricity work.
The concept of like poles repelling and unlike poles attracting from magnetism is used to explain electron behavior.
Electrons, having the same negative charge, exert a force that pushes them apart, creating electrical tension.
The force between electrons is likened to a compressed spring, illustrating the concept of voltage.
Voltage is measured and is crucial for understanding electrical flow and pressure differences.
A battery is a collection of electrons under pressure, seeking to move away from each other.
The flow of electrons, or current, is initiated by closing a switch in a circuit, creating motion.
The movement of electrons through a circuit is used to do work, such as powering a motor.
Resistance in a circuit, measured in ohms, is essential to prevent fuses from blowing.
Ohm's law is introduced as a principle, not just a mathematical equation, relating voltage, current, and resistance.
The role of resistance is to oppose the flow of current, ensuring safe and controlled electrical operation.
The concept of static voltage is explained as the stable, non-moving state of electricity at an open switch.
The importance of understanding voltage to measure and utilize it effectively in electrical systems is emphasized.
The analogy of a spring between electrons is used to explain the increase in voltage with greater compression.
The practical application of voltage and current in creating motion and doing work in electrical machines is discussed.
The potential for motors to have back EMF is acknowledged, with a note to cover it in future discussions.
Transcripts
it never would have happened without
Cooper
trucks one of the questions I get quite
often when I'm teaching because I teach
electricity is what exactly is
voltage well it's been taught forever
that it's electrical pressure and since
all of you guys pretty much understand
how Pressure Works this should make
pretty good
sense this is an electron an electron is
the negative negatively charged particle
that spins around the outside of an
atom and it's what actually moves
through a wire and it's what actually
makes electricity work electron
electricity well I like to think of
these electrons as negative because they
have a little negative attitude and a
little negative
charge maybe it works maybe it doesn't
for you but it also helps to think about
magnets because everybody watching this
understands what a magnet is and how it
works okay you take two magnets and you
put the two North Poles
together then they repel each
other okay everybody gets that and the
way it's taught in class is that like
poles
repel however we all know that if you
take magnets and you put them together
with the North and South
Pole to together or well or the South or
North Pole together then they attract
there's a force that's actually pulling
them
together and that force is magnetic
force and we also teach that unlike
poles attract so like poles repel and
unlike poles
attract so let's take our electrons
which both have negative
charges and we'll put them together and
they're fairly negative as you can tell
I draw them that way because electrons
are negative and those look like some
guys that got some pretty negative
attitudes well they have the same charge
and if you apply the magnet example then
what you get is you get a
force that's trying to push these two
guys
apart the force is pretty powerful it's
a pretty strong
force and um it's what makes our
components run makes them
work
so if you think about
this it works really well to just
visualize a
spring between the two
electrons pretend they're billiard balls
on a pool table well you probably
already have this figured out by now
because if you take two pool balls and
put them on a table with to Spring in
between them and you let
go they're going to
move cuz there's pressure in between
them all right well now they're a little
more angry and a little more negative
because they're being forced to be much
closer to each
other and when you push these guys
closer
together the force between them is
pretty huge
and this is why it's called tension
electrical tension high tension
electricity they're tense they're stuck
there next to each other wanting nothing
more than to get as far away from each
other as possible that's what makes them
move the spring is much more tightly
compressed
now and if you carry this analogy to the
end the higher compression means higher
voltage so how does this work for us why
is this theory important to us it's
important because voltage is what we
measure and knowing how voltage Works
helps when you measure it so you'll know
what it's doing or not doing well if you
put a bunch of these electron guys
together put them in a
box they call it a
battery so all these little electron
guys in here all have negative charges
and they're all trying really hard to
get pretty far away from each other and
that then puts them under
pressure this pressure is what makes
everything happen you can't have flow
without a difference in pressure
Hydraulics or pneumatics it doesn't
matter
so if we take the battery and we connect
the battery into a circuit and by the
way it's called a circuit because it's a
circle you give them a place to go
they're going to go they don't actually
move at the speed of light but the
effect is felt at the speed of
light so with a switch open here you're
going to have charges to the left and
charges to the right the polarity is
difficult to explain but effective ly
electricity is waiting at the
switch sitting there stable not
moving that's called Static
voltage but as soon as you close the
switch now things start to
happen they start moving and moving and
moving and moving mov mov really really
fast we put a motor in the way and all
of this movement Works to create motion
so the motor goes
zoom and if a bunch of these guys in a
box sitting there waiting to go is
voltage then it's pretty easy to
understand what current
is it's them moving and getting away
from each other and we use that to do
work all right every load has resistance
light bulbs coils
resistors and the resistance is measured
in ohms and the guy that figured this
out his name was George Simon oh hence
the word now for those of you who are
like like up on this stuff yeah motors
do have back EMF but we're going to
cover that another day we're just going
to treat it as if it has ohms because
effectively it does have ohms
all right well we get our motor there
and you ask yourself what is the job of
any resistor or of any resistance what
what's its job and the simplest way to
understand it is that the job of the
resistance is to keep the fuse from
blowing oh and oh yeah by the way then
if it's a motor then it
turns but the reason that the fuses
don't blow when you turn things on is
because the thing you're turning on has
resistance
so how do we summarize this well voltage
which is
pressure pushes amperage which is
current through a
resistance this is
actually OHS law because OHS law is a
concept ohms law is a
principle Ohm's law is not a math
equation
they use eal IR and they teach it is
math but it is not a math problem OHS
law is a concept not
math so voltage which is pressure
resistance and current work together to
make our machines
go for
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