Current Balance Experiment (measure magnetic field strength)

[@ngikjegjangbiuea]

The biggest problem with Flemming's left hand rule is when you almost break your wrist on a regular basis 1:23 This was a good video, though. Will probably come back nearer any tests we need to do

[@AllaBader01]

Nice work , when the new video uploaded ?

[@PhysicsHQ]

Thanks! Sorry 😐 I planned to do it last week but was so busy. I’ve just finished processing it and will upload tonight or tomorrow.

[@PhysicsHQ]

Video available now: kzbin.info/www/bejne/nnqtoH-fh6ydoNE

[@academyzee9301]

thank you so much for this wonderful amazing video, really really helpful

[@PhysicsHQ]

Thank you so much for your kind words.

[@zoovierjordan2712]

what is the purpose of a scale in this experiment?

[@PhysicsHQ]

The scale measures the force between the magnet and wire. The value is adjusted so it reads as a mass so we reverse that and calculate force from the mass.

[@lamerfx4461]

@@PhysicsHQ how would you reverse the mass?

[@PhysicsHQ]

When I said that we "reverse" it I meant not that we "reverse mass" but we reverse the concept and calculate the force from the mass shown on the scales. The scales actually measure force and calculate a mass value from that. We reverse the calculation done internally by the scales since we are actually interested in the force value.

[@mcdudelydoo3116]

Does that particular magnet shape have a specific name?

[@PhysicsHQ]

We always refer to it as a “Major magnet” since suppliers list it as such. That’s most likely a consequence of its very high power rather than shape.

[@kadagaladileep1862]

helpful video....thankuuuu😊😊😊🦋🦋

[@PhysicsHQ]

You’re welcome ! Thanks for your feedback 😇

[@FakedevilPd]

Can you help me pls Can you include all the topic to be included in this presentation

[@valterszilberts3691]

how the fact that the wires get hot when the amperage is 3A affects the result and the experiment?

[@PhysicsHQ]

Resistance of the wire increases when its temperature increases. And temp increases significantly at a current of 3 A.

[@chrishewitt9953]

Hi I have a question is the total magnetic force acting on a semi-circular wire the same as what's exerted on a fully circular wire

[@PhysicsHQ]

Yes it would be provided it’s the same current flowing: F = BIL sinθ. F is independent of A in some sense there. However, I = nAve (taking q = e since it’s a wire). So if we used same metal for our semi circular wire with same n, and ensured same v then I is proportional to A. Specifically by moving to a semi circular wire we’ve halved the A so current will halve. F∝I so the force will also halve.

[@chrishewitt9953]

Thats amazing. Thank you so much for your help, that makes so much sense now

[@PhysicsHQ]

Great. You’re welcome.

[@defioctavia5516]

Hallo, I am from Indonesian I want to ask you about the magnet where can i buy neodymium magnets?

[@PhysicsHQ]

We bought ours from an educational supplier.

[@defioctavia5516]

excuse me, I want to ask again in the circuit, what is the voltage and power of the rheostat needed? Thanks

[@PhysicsHQ]

Hi. Voltage was about 6 V The rheostat had a maximum resistance of about 35 Ω.

[@defioctavia5516]

I am sorry one more question how many watts of power is needed?

[@defioctavia5516]

@@PhysicsHQ thank you so much for the answer

[@ethandewell3019]

just here for the montage

[@antoineblanchard]

you can do better things whit that lab, and music as dissapoint

[@PhysicsHQ]

Please elaborate as the comment seems incomplete. It seems you didn’t like the music but also something of the content disappointed but I’m not sure what did.

[@antoineblanchard]

hI, i know nobody likes that kind direct comment what was i do. i was honest, you can do better things. best regards. // elaborated answer are for student..child one.

[@antoineblanchard]

..real do hide public comment..so child

[@PhysicsHQ]

Thank you for your feedback. If you'd like to make suggestions that for better things that I can do please do contact me by email via my website, I’m more than happy to meet the needs of students. Thanks. I made this video since this is an experiment that is required knowledge at A-Level.

[@nazifishrak8275]

Antoine blanchard you aren't paying him, so stop getting disappointed. If you wanna give suggestions, then go on. But you look like someone who argues at the mall for a free sample