Magnetism
... For a long time, people knew only one source of magnetism from Iron. In 1821, a Danish physicist, Oersted noticed that an electrical wire carrying current made the near-by compass reorient. First clue of inter-relation between electricity and Magnetism. Ampere, Faraday established the nature of el ...
... For a long time, people knew only one source of magnetism from Iron. In 1821, a Danish physicist, Oersted noticed that an electrical wire carrying current made the near-by compass reorient. First clue of inter-relation between electricity and Magnetism. Ampere, Faraday established the nature of el ...
Magnetism on-line 2015
... 3) What is a compass and what direction does it always point? 4) What would you expect to happen if a magnet is suspended by a string and allowed to hang freely in the air? 5) From your observations, what can you conclude about the Earth’s magnetic properties? 9. Magnetic Lines of Force 1) What happ ...
... 3) What is a compass and what direction does it always point? 4) What would you expect to happen if a magnet is suspended by a string and allowed to hang freely in the air? 5) From your observations, what can you conclude about the Earth’s magnetic properties? 9. Magnetic Lines of Force 1) What happ ...
... Consider a system of N non-interacting spins of moment m in an external magnetic field H, temperature . The spin magnetic moment can be either 'up' or 'down'. a. What are the possible energies of such a spin in the field H? b. Find the partition function of one spin c. Find the partition function ...
Lect-1-2-Intro+SingleParticle
... The lamor radius is smaller where B is larger, since rL mv eB , etc. This leads to the grad-B drift velocity ...
... The lamor radius is smaller where B is larger, since rL mv eB , etc. This leads to the grad-B drift velocity ...
DC Motors
... They consist of permanent magnets and loops of wire inside. When current is applied, the wire loops generate a magnetic field, which reacts against the outside field of the static magnets. The interaction of the fields produces the movement of the shaft/armature. ...
... They consist of permanent magnets and loops of wire inside. When current is applied, the wire loops generate a magnetic field, which reacts against the outside field of the static magnets. The interaction of the fields produces the movement of the shaft/armature. ...
Static Magnetic Fields
... The Biot-Savart law states that at any point P the magnitude of the magnetic field produced by the differential element dl is a) Proportional to the product of current, the magnitude of the differential length, and the sine of the angle lying between the element and a line connecting the element to ...
... The Biot-Savart law states that at any point P the magnitude of the magnetic field produced by the differential element dl is a) Proportional to the product of current, the magnitude of the differential length, and the sine of the angle lying between the element and a line connecting the element to ...
Solns
... a. What is the magnetic field created at the midpoint of the bar if a 60-A current flows through the circuit? (Hint: Assume that the field at the midpoint is due only to magnetic fields created by currents flowing in the top and bottom rails, which can be modeled as two long straight wires.) ...
... a. What is the magnetic field created at the midpoint of the bar if a 60-A current flows through the circuit? (Hint: Assume that the field at the midpoint is due only to magnetic fields created by currents flowing in the top and bottom rails, which can be modeled as two long straight wires.) ...
Magnetic monopole
A magnetic monopole is a hypothetical elementary particle in particle physics that is an isolated magnet with only one magnetic pole (a north pole without a south pole or vice versa). In more technical terms, a magnetic monopole would have a net ""magnetic charge"". Modern interest in the concept stems from particle theories, notably the grand unified and superstring theories, which predict their existence.Magnetism in bar magnets and electromagnets does not arise from magnetic monopoles. There is no conclusive experimental evidence that magnetic monopoles exist at all in our universe.Some condensed matter systems contain effective (non-isolated) magnetic monopole quasi-particles, or contain phenomena that are mathematically analogous to magnetic monopoles.