Jumping Wire

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Jumping Wire

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Harvard Natural Sciences Lecture Demonstrations

Жыл бұрын

A current-carrying wire interacts with an external magnetic field. The direction of the force is perpendicular to both the current and the magnetic field. The battery is a 12 Volt gel cell. The wires have a total resistance of about 0.1 Ohms. The magnetic field is about 0.3 Tesla between the poles, with the red and green tape indicating north and south, respectively.
For more details about our setup, see sciencedemonst...

Пікірлер: 22

@Electromechaniac Жыл бұрын

A good demonstration of the Lorentz force (Right-hand rule). Almost all electric drives work according this principle.

@Hopeless_and_Forlorn Жыл бұрын

Very impressive. In 1968, the instructor at the electronics trade school I was attending brought out a high-voltage transformer for a neon sign and a thick piece of plate glass about a meter square with aluminum foil stuck to each side--inductor and capacitor deluxe. He connected the two sides of foil with wires to the transformer terminals and left the wires loose on the floor. When he plugged it in, the room was filled with a loud crackling as arcs passed around the edges of the glass between the foils, leaving etched tracks in the glass, and the wires visibly jumped. He did not leave it on long, because he did not want to expose us to excessive X rays, but the room was left smelling of sulfur. We were properly impressed.

@Muonium1 Жыл бұрын

no x-ray risk. In air, the mean free path of the e-'s before colliding with a molecule are far too short to accumulate enough kinetic energy while they're being accelerated by the ambient field gradient in order to produce x-rays on colliding with anything. Need to be in a vacuum to increase the MFP to something much larger to do that with laboratory scale voltages. Can't produce x-rays in air with sparks alone unless the volts and amps are insanely high such as in a lightning bolt. Even then the radiation flux is fairly limited.

@Hopeless_and_Forlorn Жыл бұрын

@@Muonium1 Thanks for the info. I have always wondered about the possibility of X-ray emissions from large Van de Graaff generators and such.

@robertpitt8418 Жыл бұрын

That truly is fascinating, i never expected a change in direction to take place. Thank you.

@learnwithatiya Жыл бұрын

Awesome demonstration

@danish8435 Жыл бұрын

Best demonstration.

@darshpatel5412 Жыл бұрын

I'M THE NEW SUBSCRIBER

@ostanin_vadym Жыл бұрын

Thank you for interesting science demonstration

@gristlevonraben Жыл бұрын

Funny, and very cool video.

@owlredshift Жыл бұрын

A real "Side Splitter"

@Tuepp Жыл бұрын

Exactly as I'd expect since very first physic lessons I guess. No idea why KZfaq suggested me this video.

@owlredshift Жыл бұрын

"Worthless, espteric concepts that underpin our entire society's lives! Nobody forgets things, everyone knows physics! Stupid KZfaq, you're _supposed_ to know everything about me. Oh great, it's succinct and presented well. That's it, I'm leaving a comment about this experience, 👎 everyone must know that _I'm very smart_ . Hmm... Better go with a casual, disinterested tone for this one."