CONDENSED MATTER: towards Absolute Zero CONDENSED
... we find that the total circulation is quantized- we have ‘quantized vortices’. In this simple picture the core is like a string- in fact it has a finite diameter. In He-4 this is very small (only about 1 Angstrom!), but in other superfluids like He-3 it is much larger (~ 150 Angstroms), & so the cor ...
... we find that the total circulation is quantized- we have ‘quantized vortices’. In this simple picture the core is like a string- in fact it has a finite diameter. In He-4 this is very small (only about 1 Angstrom!), but in other superfluids like He-3 it is much larger (~ 150 Angstroms), & so the cor ...
Inductor Basics notes
... An inductor is a series of turns of wire around a core material. The core can be air, soft iron in solid of powdered form, graphite or alloys of different metals chosen for their magnetic properties. The inductance of a coil (inductor) is dependant on: 1. Number of turns 2. Area (How close the turns ...
... An inductor is a series of turns of wire around a core material. The core can be air, soft iron in solid of powdered form, graphite or alloys of different metals chosen for their magnetic properties. The inductance of a coil (inductor) is dependant on: 1. Number of turns 2. Area (How close the turns ...
Word
... 18) When a bar magnet is pushed N pole first into a solenoid, the needle of a galvanometer connected to the solenoid moves to the right. The needle will move to the left when the magnet is then a) pulled out the bottom b) pulled back out the top c) held stationary d) both answers a) and b) 19) A mag ...
... 18) When a bar magnet is pushed N pole first into a solenoid, the needle of a galvanometer connected to the solenoid moves to the right. The needle will move to the left when the magnet is then a) pulled out the bottom b) pulled back out the top c) held stationary d) both answers a) and b) 19) A mag ...
Materials Needed for the Lesson
... 4.3.15 Demonstrate that without touching them, a magnet pulls all things made of iron and either pushes or pulls other magnets. 4.3.16 Investigate and describe that without touching them, material that has been electrically charged pulls all other materials and may either push or pull other charged ...
... 4.3.15 Demonstrate that without touching them, a magnet pulls all things made of iron and either pushes or pulls other magnets. 4.3.16 Investigate and describe that without touching them, material that has been electrically charged pulls all other materials and may either push or pull other charged ...
Basic electromagnetism and electromagnetic induction
... Here are a few ways in which the strength of the magnetic field may be increased: pass a greater electrical current through the coil, use more turns of wire in the coil, or accentuate the field strength using better or larger magnetic core materials. These are not the only ways to increase the mecha ...
... Here are a few ways in which the strength of the magnetic field may be increased: pass a greater electrical current through the coil, use more turns of wire in the coil, or accentuate the field strength using better or larger magnetic core materials. These are not the only ways to increase the mecha ...
Homework-Force
... (We haven't talked much about the second term yet, since we've c 2 t been focused on statics this term, but it's there!) Take the divergence of this equation, and show that electric charge is conserved globally. I think both these results are pretty cool, and carry very deep messages about the natu ...
... (We haven't talked much about the second term yet, since we've c 2 t been focused on statics this term, but it's there!) Take the divergence of this equation, and show that electric charge is conserved globally. I think both these results are pretty cool, and carry very deep messages about the natu ...
PHYSICAL SCIENCE
... Faraday’s Law • As long as a loop of wire continues to move in or out of the field in a direction that is not parallel to the field, an induced current will exist in the circuit. • An outside force must be used to push the circuit through a magnetic field. • The stronger the magnetic field, the more ...
... Faraday’s Law • As long as a loop of wire continues to move in or out of the field in a direction that is not parallel to the field, an induced current will exist in the circuit. • An outside force must be used to push the circuit through a magnetic field. • The stronger the magnetic field, the more ...
Tesla_04 - StealthSkater
... making such devices more compact and more efficient. Making no waves The idea of transmitting energy wirelessly isn't new. For almost 2 centuries, scientists have known that rapidly changing magnetic fields (such as those produced by an alternating current flowing through a wire) can induce an elect ...
... making such devices more compact and more efficient. Making no waves The idea of transmitting energy wirelessly isn't new. For almost 2 centuries, scientists have known that rapidly changing magnetic fields (such as those produced by an alternating current flowing through a wire) can induce an elect ...
Homework Set #3 - Solutions
... Partial credit may be given even if the final answer is incorrect so please show all work! Question 1 (1 point) What is Lenz’s Law? To which basic principle of physics is it most closely related? 1) Lenz’s law = The induced current in a loop is in the direction that creates a magnetic field that opp ...
... Partial credit may be given even if the final answer is incorrect so please show all work! Question 1 (1 point) What is Lenz’s Law? To which basic principle of physics is it most closely related? 1) Lenz’s law = The induced current in a loop is in the direction that creates a magnetic field that opp ...
Lecture 20
... Conduction Current Density J In situations where there is a variation in the current magnitude it is rather inadequate to define just the total current flow in the system. One can then use the current density as the primary parameter which is defined as the current flow per unit area. ...
... Conduction Current Density J In situations where there is a variation in the current magnitude it is rather inadequate to define just the total current flow in the system. One can then use the current density as the primary parameter which is defined as the current flow per unit area. ...
Induction and Inductance
... • Just as capacitors can be used to produce electric field, an inductor can be used to produce a desired magnetic field. • The inductance of an inductor is given as (Tesla sq meter per Ampere) ...
... • Just as capacitors can be used to produce electric field, an inductor can be used to produce a desired magnetic field. • The inductance of an inductor is given as (Tesla sq meter per Ampere) ...
ELECTRICITY AND MAGNETISM II
... (a) Find the self-inductance per unit length of a long solenoid, of radius R, carrying n turns per unit length. (b) Find the energy stored in a section of length l of a long solenoid (radius R, current I, n turns per unit length) using your result of part (a). (c) Find the energy stored in a section ...
... (a) Find the self-inductance per unit length of a long solenoid, of radius R, carrying n turns per unit length. (b) Find the energy stored in a section of length l of a long solenoid (radius R, current I, n turns per unit length) using your result of part (a). (c) Find the energy stored in a section ...
Superconducting magnet
A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire can conduct much larger electric currents than ordinary wire, creating intense magnetic fields. Superconducting magnets can produce greater magnetic fields than all but the strongest electromagnets and can be cheaper to operate because no energy is dissipated as heat in the windings. They are used in MRI machines in hospitals, and in scientific equipment such as NMR spectrometers, mass spectrometers and particle accelerators.