My A-level book doesn‘t cover this, and while it‘s not included in the syllabus, i‘d really like to know:1- What causes unlike particles to attract and vice verse?2- Why do magnets exist only as dipoles?3- What would be the significance of finding a magnetic monopole?4- What exactly makes up a magnet? (Particle wise)5- What causes magnets to attract some materials more strongly than others? (if at all)?6- Why is gravity weaker than all the other forces?
1. It attracts becasue they are in the presence of eachothers electric field and therefore have an unstable energy (A Potential energy). The charges will feel a force that is describe by columbs law. If you were to ask why on the other hand.i would have to say that its just the way the universe works.there is no way to answer that question 2. Becasuse there are only two ways to have a magnetic field (As far as the current accepted physics is concerned). One is by a charged particles moving in a curled path (This is the only way we can create a magnetic field.and it is the way we observe them naturally in the macroscopic universe). The second is by a fundamental property of particles known as the spin. The spin seems to mirror a particle actually spining and hence a charge rotating creates a magnetic field.except that the charge is not actually spinning. This is one of the quantum numbers. Both these methons produce dipole fields. There have been no observed monopole magnetic fields in nature 3. This one i am not sure about. All i could say would be that it would one of the most important discoveries in history 4. atoms. The electrons revovle around the nuclei and cause magnetic fields. The uniqure feature of magnet is that a large percentage of the magnetic moments created from the revovling charges are lined up. When they are aligned like that there magnetc field strensts add 5. I would guess that it depends on how easilly the atoms in atoms in the material could be rotated by the magnetic field and aligned. Also depend on the temperature of the object. Also depends on the conductivity of the object (guess). 6. It is unkown why gravity is weaker. That question is like asking why was the universe created in teh first place.
Unfortunately you can never receive a real answer to these questions. It is just the way our fundamental forces work. There might be a fundamental control panel of our universe in which an extraphysical being can tune all of these observations to being different. If you could thouroghly answer all these questions, you are likely eligible for a Nobel prize. 1- What causes unlike particles to attract and vice verse? We don't know why. This is just the way the force of electrostatics works. 2- Why do magnets exist only as dipoles? Because the source of all magnetism is charges in motion, and all charges in motion create complete loop fields. Thus when one makes a permanent magnet, it must have both a North and a South pole. This derives from Gauss's law for magnetic fields. 3- What would be the significance of finding a magnetic monopole? No significance. It would just be interesting to find a counter example to the four fundamental equations of electromagnetism. 4- What exactly makes up a magnet? (Particle wise) The source of all magnetism is motion of electrical charges. Every atom of a ferromagnetic material is a tiny magnet, but in scattered directions of its magnetic field. When aligned they form a magnet. 5- What causes magnets to attract some materials more strongly than others? (if at all)? The property of magnetic permeability, and which class of magnetic material said material fits in. Ultimately it boils down to how easy is for the external magnet to create its own alignment of magnetic domains. 6- Why is gravity weaker than all the other forces? It just is.
at the beginning, you're taking the area between 2 adjoining expenditures to be d. in case you do this, the area between expenditures on the different sides of the sq. would be sqrt(2)*d. the electrical powered rigidity is okay*Q1*Q2/r^2 The rigidity on B from C is as a result: ok*a million.0*a million.0/(sqrt(2)*d)^2 ok*a million.0*a million.0/(2*d^2) The rigidity on B from A is: ok*Q1*a million.0/d^2 The rigidity on B from D is an identical, yet at suitable angles. in case you carry out a vector addition of the forces from A and D, you get an entire rigidity of sqrt(2)*ok*Q1*a million.0/d^2, interior an identical path because of the fact the rigidity from C. you merely would desire to remedy for Q1 so as that the entire rigidity from A and D cancels the rigidity from C: sqrt(2)*ok*Q1*a million.0/d^2 - ok*a million.0*a million.0/(2*d^2) Q1 -0.35 C (you ought to truly draw the vectors your self to comprehend the challenge.)
