Electromagnetism – Magnetic Force: The Four Fundamental Forces of Physics #4b

Electromagnetism – Magnetic Force: The Four Fundamental Forces of Physics #4b


Welcome to our second episode on electromagnetism, one of the four fundamental forces
of physics. Like I said last time, there are two aspects to electromagnetic force Electrostatic force which builds up a charge in an object and can travel in the form of an electron stream and Magnetic force which is responsible for the way magnets work. But even though their effects look different to us, they are in fact, one of the same. Hopefully, you remember that electromagnetism acts on objects that have electric charge, this charge creates a field around an object. But a magnetic field is a little bit different from an electrostatic field. For starters, unlike a charged particle which can either be positive or negative, a magnetic field has both a positive and a negative area, what we call a North and South poles. Magnets always have both poles, no matter how many tiny little pieces you cut them up into But magnetic poles interact much like single pole charged particles, the same poles repel each other and the opposite poles attract. And this like with electrostatic force because its the same force Magnetic force is carried between objects by photons. To demonstrate that electrostatic and magnetic are, in fact, effects of the same force you can create magnetism using electricity A simple electromagnet is just a coil of wire in which when a current is passed through, it generates a magnetic field. You can make one yourself by passing an electric current though a wire wrapped around a nail or a screw. Switch on the current, and the screw becomes a magnet, switch it off again and the magnetism disappears The magnets on your fridge are made basically the same way, only with a lot more electrical power, and using special materials to retain the magnetism. And, hey, you know what else is an electromagnet? You’re living on one. The constant churning of the molten iron in the Earth’s outer core crates electrical currents and those currents generate the Earth magnetic field. Which has proven to be super useful for things like navigation and since, the magnetosphere protects us from solar wind — not being dead. So an electric current produces a magnetic field, the reverse must also be true, and in fact, yes, you can generate an electric current using a changing pattern of magnetism. If you put a coil of wire within a magnetic field and continuously spin the wire or the magnet, so that the magnetic field inside the wire fluctuates, electricity will flow through the wire. And this is really exciting cause it’s the reason why we have electricity. All you have to do is keep the wire or the magnet moving, and you’ll have a continuous source of electricity. Stop moving and the electric current will stop. This is how pretty much every source of electricity in the world works, from wind turbines, to hydroelectric dams, to coal and nuclear power. The only big exception is solar power, which is really interesting, so we did a whole episode on it. Which brings us to the conclusion of our series on the four fundamental forces of physics. If you have watched all of them, you are now a master, well not quite a master, but you’re getting there. If you don’t feel like you have quite mastered them, you can go re-watch those episodes Also we’ll suggest some books down in the comments that you can continue to develop your understanding of THE STUFF THAT MAKES THE WHOLE WORLD WORK. Thank you for watching this episode of scishow, if you have ideas or suggestions or questions, Please leave them on our Facebook or Twitter for us to see, or the YouTube comments below And if you want to keep getting smarter with us please subscribe.

100 thoughts on “Electromagnetism – Magnetic Force: The Four Fundamental Forces of Physics #4b”

  1. If you want to have more thumbs up , speak slowly! When we try to grasp the new things, we have to listen and solve the information given simultaneously right away.

  2. Thanks Hank, loved this series! I'd like more info on how photons are the electromagnetic force carriers, and how this works. You talked about how gluons play a part in the strong interaction, and how W and Z bosons change quark colour in the weak interaction, could you do the same for photons? That would be amazing! Ollie.

  3. Humanbrains work with electricity.Our whole bodie is covered with streams of blood that have Ferum .Human and other organisms generate daily electromagnetick fields with our toyghts.The shape of the field is called ayra.

  4. 2:03 why not explain why and how this works? As with other stuff, I feel these series just inform you of things about science but don't go into any detail at all.

  5. It's not known the earth core is molten Iron as stated by the presenter. The deepest drilling has only gone down 12 miles and drilling stopped due to flooding.

  6. how do the force carriers (photons) work? where do they get the power to be emitted? how does distance effect their influence?

  7. If photons carry electrostatic force between protons and electrons, and we can create magnetic fields with electricity, then can we create magnets with light?

  8. Constantly stressing myself out with photons, electricity and magnetism.

    Classical physics, describes the "Creation" of a EM field around an electromagnet for example, as the emitting of an electromagnetic field that was not there before…

    Whereas quantum field theory argues this is the bending of a pre-existing universal field called the electromagnetic field/photon field… much like mass bends spacetime.

    But then I confuse myself because Quantum field theory argues the electron has its own quantum field independant of the electromagnetic field… and veritasium showed that electrons have an innate magnetic moment, and influence one another with no mention of photons, or perturbations in The EM field… as the same logic would apply to the peturbations in the electron field.

    Researching both… when so many different videos provide different phrasings and use imprecise language is really frustrating. As I'm trying to figure it out and these ideas keep clashing.

    I wanna rip my hair out.

  9. Honestly, a quite poor explanation of how it really works, just some examples and practical uses, but no real deep expanation of how it's generated.

  10. So that means if you generate electricity thought the wire and somehow create enough electricity to power a small fan then you can keep the wire moving to power more small things like a light?????

  11. Apparently they can make an ULTRA electromagnet with Carbon nano tubes. I can handle current 5,000 times more than copper and contain an ultra magnetic field. Makes sense because electro magnets are stronger with more windings and that stuff is tiny.

  12. the core of the earth isn't molten iron…the deepest anyone ever drilled into the earth was the Russians and it was 12 kilometer, you can look it up. There is no evidence backing up the core of the earth being molten iron, no one has ever penetrated that deep. Un learn school teachings, there just programs to keep you in the dark.

  13. This is another reason why main stream scientist are a part of the problem, you are told and shown that running electrical current through copper coils produces a magnetic field. What he didn't tell you is that powerful magnetic's create electrical current in copper coils at a distance.
    https://www.youtube.com/watch?v=Kgh78Oj5cKk

  14. HOW DOES THE WIRE IN THE MAGNETIC FIELD KEEP MOVING? I just do not seem to understand this explanation..

  15. These four fundamental forces seem so different, if only there was a universal theory to connect such big forces to the small ones!

  16. Flat Earther's believe that it's electromagnetism that energizes the small, close sun as it circles the motionless flat Earth.

  17. Open an internet accessible university please, you've effectively created a supplementary high school haha. PBS has the potential to lead the way in non-bias, educational media and information and, I'm sure I've read PBS is the most trusted source in America. Great work always.

  18. THE MATHEMATICAL PROOF THAT ELECTROMAGNETISM/ENERGY IS GRAVITY IN A BALANCED FASHION IS SUCCESSFULLY DEMONSTRATED:

    "Mass"/ENERGY IS GRAVITY. ELECTROMAGNETISM/ENERGY IS GRAVITY. THE SUN AND THE EARTH are F=ma AND E=mc2, AS ELECTROMAGNETISM/ENERGY IS GRAVITY. E=mc2 is DIRECTLY AND FUNDAMENTALLY DERIVED FROM F=ma. F=ma AND E=mc2 PROVE that ELECTROMAGNETISM/ENERGY IS GRAVITY, AS ALL of SPACE is NECESSARILY ELECTROMAGNETIC/GRAVITATIONAL (IN BALANCE); AS ELECTROMAGNETISM/ENERGY IS GRAVITY. "Mass"/ENERGY IS GRAVITY. ELECTROMAGNETISM/ENERGY IS GRAVITY. Energy has/involves GRAVITY, AND ENERGY has/involves inertia/INERTIAL RESISTANCE. Gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE, AS ELECTROMAGNETISM/ENERGY IS GRAVITY. This explains F=ma AND E=mc2, AS ELECTROMAGNETISM/ENERGY IS GRAVITY. SO, GRAVITATIONAL FORCE/ENERGY IS proportional to (or BALANCED with/as) inertia/INERTIAL RESISTANCE; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. ACCORDINGLY, ALL of SPACE is NECESSARILY ELECTROMAGNETIC/GRAVITATIONAL (IN BALANCE); AS ELECTROMAGNETISM/ENERGY IS GRAVITY. "Mass"/ENERGY involves BALANCED inertia/INERTIAL RESISTANCE consistent WITH/AS what is BALANCED ELECTROMAGNETIC/GRAVITATIONAL FORCE/ENERGY, AS ELECTROMAGNETISM/ENERGY IS GRAVITY. GREAT !!! Gravity IS ELECTROMAGNETISM/ENERGY. ELECTROMAGNETISM/ENERGY IS GRAVITY. INDEED, A PHOTON may be placed at the center of THE SUN (as A POINT, of course); as the reduction of SPACE is offset by (or BALANCED with) the SPEED OF LIGHT; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. GREAT. "Mass"/ENERGY IS GRAVITY. ELECTROMAGNETISM/ENERGY IS GRAVITY. ALL of SPACE is NECESSARILY ELECTROMAGNETIC/GRAVITATIONAL (IN BALANCE), AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Great. The ability of thought to DESCRIBE OR RECONFIGURE sensory experience is ULTIMATELY dependent upon the extent to which THOUGHT IS SIMILAR TO sensory experience. (THOUGHTS ARE INVISIBLE.) Gravity IS ELECTROMAGNETISM/ENERGY. ELECTROMAGNETISM/ENERGY IS GRAVITY.

    Very importantly, outer "space" involves full inertia; AND it is FULLY INVISIBLE AND black. The perpetual motion of WHAT IS THE EARTH is NOW explained. GREAT !!! The idea that THE PLANETS are "falling" in what is "curved space" in RELATION to what is THE SUN is PROVEN to be NONSENSE. So, the falling objects must be considered in RELATION to WHAT IS THEN THE ORBITING EARTH. GREAT !!!!!!!!!!

    By Frank DiMeglio

  19. Why couldn't we build hamster wheels with shaft spinning magnets around copper wire and have the low skilled of the world to run the wheel? Easy renewable electricity.

  20. Once again, nothing is explained… Im starting to think that all of science is a giant con game… Do you know what magnetism is or not?

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