Magnetic Field of a Straight Current Carrying Wire
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- เผยแพร่เมื่อ 30 ก.ค. 2024
- This physics video tutorial explains how to calculate the magnetic field of a wire. It provides the formula needed to calculate the magnetic field of a straight current carrying conductor at some distance away from the straight wire. This video also explains how to calculate the net magnetic field between two parallel wires. This video on magnetism contains plenty of examples and practice problems.
Magnetic Force on a Current Carrying Wire:
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Magnetic Force on a Moving Charge:
• Magnetic Force on a Mo...
The Homopolar Motor:
• Physics - Homopolar Mo...
The Lorentz Force:
• Battery Powered Electr...
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Magnetic Sensors - The Reed Switch:
• Magnetic Sensors - The...
Magnetic Force Between Two Parallel Wires:
• Magnetic Force Between...
Ampere's Law - Magnetic Field of a Solenoid:
• Ampere's Law & Magneti...
Magnetic Field of a Toroidal Solenoid:
• Magnetic Field of a To...
Magnetic Field of a Moving Charge:
• Magnetic Field of a Mo...
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Torque on a Loop - Magnetic Dipole Moment:
• Torque on a Current Lo...
The Hall Effect:
• Hall Effect Explained,...
Magnetic Flux:
• Magnetic Flux, Basic I...
Faraday's Law of Electromagnetic Induction:
• Faraday's Law of Elect...
Lenz's Law - Induced Current:
• Lenz's Law, Right Hand...
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I just want to say, I have used your videos to help me study, and you are awesome. I don't think I would've passed any of my physics classes without your help.
I do not know how you have a video on almost everything. You are truly amazing. Thank you for all of the hard work you put into your videos.
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This needs way more views
Thank you so much! I was really confused about these types of problems but not anymore
This is way helpful ever.. well done . Thank you.
Thank you for the visual of how to tell what part of your fingers to look at for into/out of the page! I have been so confused about how to tell and this made it so clear. You're the best!
Quantum physics has been struggling to explain the phenomena of magnetism for quite some time now. In fact, some scientists have even suggested that quantum mechanics cannot explain magnetism at all, because they have excluded Ether from their theory. The magnetic field is created by a current carrying wire, and it's based on the exchange of electric and magnetic fields. However, quantum mechanics doesn't seem to be able to account for this field very well. Some researchers believe that there must be something else involved in creating and maintaining a magnetic field-something like ether. If this is true, then quantum mechanics may need to be revised in order to include Ether as a part of its theory.
This is a very organised explanation thank you but I just wanna ask if the two parallel wires having current in the same direction then the resulted magnetic field between them will be out or in the page
A current of 5A flow in a straight wire in a uniform flux density of 2×10−3 T . Calculate the force per unit length of the wire if it is perpendicular to the field?
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omg why couldnt my textbook talk about the point below or above the pen/wire for the right hand rule??? Thank you so much I could never pass physics with just that useless book.
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god this is so much clearer now
Im assuming this formula will only apply to conductors in DC circuits. DC conductors flow current in one direction. How would you calculate for AC?
1:13 is the direction of magnetic field line of East correct? The direction seems to disobey right hand grip rule? I thought it should be same direction with the North which is anti clockwise....
Thanks
Thx bro
Sir: with all respect, are the magnetic forces which two wires carrying current exert on each other will be affected if the two wires are insulated (they are both have plastic covers)?
I believe that it might slightly change the value, but overall not very much. Since the force is (mainly) due to the distance from the wire, the insulation will not have a great effect. The one thing it might change (i'm not sure) is whether or not it is accurate to use the permittivity of free space constant, but once again even that would not change the value of the force greatly.
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Is there a video for a SHORT wire?....where we include the length and angles in the equations?
This is well over due for you, but since it might help someone else. You simply need to use B = u0 I / 4piR (sin(theta 1) + sin(theta 2)) where theta 1 and theta 2 are angle 1 and angle 2, respectively.
Thanks alot sir 🙏🏻🙏🏻🙏🏻🙏🏻, your a god
Can this be used to determine the magnetic field around a 3 phase electrical cable?
yes, wherever the point is, just have the net magnetic field equal to all the currents and the distance away from the point. Use the second example and expand it to a 3-phase electrical cable.
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Please help to solve refraction and Suspension also Len ,electrodynamic and soon an finally I love your teaching
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Okaaaay so when finding the direction of the force and magnetic field we use right hand rule
what if i have B's and two of them are going out of the page and two of them are going inside the page
6:34 shouldn't the magnetic field be the other way if your thumb is pointing to the right, with fingers wrapped inwardly facing you?
thats what I am also confused about yeah
you are the best.
So we neglect the diameter of the wire in example 2?
from what i understand the radius isnt the radius of the wire, it is the radius from the center of the wire to the point of interest. so in example 2, the radius of the top wire to the point of interst is 2 and the radius of the ottom wire to the point of interst is 3
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what about a point below both wires at point C?
I guess you'd add the distances, like he did when the point was above the first wire. That is, A.
thanks!
What calculator are you using???? I can't find my answer in here😭😓
maybe u can simplify the 4pi x 10^-7 with 2pi, so it becomes 2 x10^-7
Ej best in physics
At 7:44 on the second wire aren’t the magnetic fields reversed?
that's what i thought too
He later corrected himself
Exactly how I like it: no 5-minute shit before the video starts, gets down to business at 0:00.
Yeah I understand that
Thank you once again.
A magnetic field is essentially a dielectric field that has lost energy or inertia. That is the basis of Ether. The magnetic field is created by a current carrying wire. The electric and magnetic fields lines interact, creating the magnetic field. The strength of the magnetic field depends on the amount of current flowing through the wire.
Is the magnetic field NOT supposed to be a vector????
Why are there different forms for different magnetic fields
Exactly this is so gay there’s like 15 different magnetic field equations you have to remember
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how did you typed that in the calculator, im not getting same results. permeability is just 1 right, without fancy writing. en.wikipedia.org/wiki/Permeability_(electromagnetism)
why does my calculator keep giving me a syntax error
**THE EXACT PHYSICAL NATURE OF THE CREATION OF THE WIRE'S MAGNETIC FIELD**
Current flow does not cause the magnetic field creation. Not in the way people think.
In a 12 gauge copper wire (2mm diameter), at 1 amp, a single electron moves only
0.000023 meters per second. See en.wikipedia.org/wiki/Drift_velocity#Numerical_example
I'm going to figure out the exact physical nature of the magnetic field around the wire. A couple things stand out:
1) there are no electrons flowing down the wire. How long will it take one electron in a 1 amp, 12 gauge wire to move one meter?
Distance = Rate x Time.
1 meter = .000023 meters/second x Time.
Time = 1 meter / .000023 meters/second = 43,478 seconds = 742.64 minutes = 12.1 hours
"But that's just one electron. There's millions of electrons. You forgot about that."
No. Every electron is traveling slower than frozen molasses, .000023 meters/second, 1 meter in 12.1 hours.
So moving electrons do not create the magnetic field. The magnetic field appears INSTANTLY the moment power is turned on (speed of light, just like the electric field) and the electrons are taking 12.1 hours to move only one meter.
And it's not the random movement of electrons either - the magnetic field around the wire would be random in that case, and the field is not random.
2) the orientation of the (rotating) magnetic field around the wire is the same every time - right hand rule.
3) it is a north magnetic pole - every time power is on.
I'm starting there. The suspicion is that the field gradient is part of the reason for the consistency of the magnetic pole being north consistently.
Memorial university of Newfoundland