Physics 2102 Spring 2002 Lecture 8
... of the charge, proportional to the electric charge: FE = qE We know that a magnetic field exists because it accelerates electric charges in a direction perpendicular to the velocity of the charge, with a magnitude proportional to the velocity of the charge and to the magnitude of the charge: FB= q v ...
... of the charge, proportional to the electric charge: FE = qE We know that a magnetic field exists because it accelerates electric charges in a direction perpendicular to the velocity of the charge, with a magnitude proportional to the velocity of the charge and to the magnitude of the charge: FB= q v ...
Homework No. 04 (Spring 2014) PHYS 420: Electricity and Magnetism II
... Hint: Use J(r) = ρ(r)v, and v = ω × r for circular motion. (b) Using Z ...
... Hint: Use J(r) = ρ(r)v, and v = ω × r for circular motion. (b) Using Z ...
Sri Venkateswara College Of Engineering Department of Applied
... Certain metals and alloys exhibit almost zero electrical resistivity when they are cooled to sufficiently low temperature. This phenomenon is known as superconductivity. 10. What do you understand by the terms ‘critical temperature’ and ‘critical field’ of a superconductor? The temperature at which ...
... Certain metals and alloys exhibit almost zero electrical resistivity when they are cooled to sufficiently low temperature. This phenomenon is known as superconductivity. 10. What do you understand by the terms ‘critical temperature’ and ‘critical field’ of a superconductor? The temperature at which ...
Ivan Lomachenkov
... • It’s not difficult to estimate the radial velocity of the ions of Na. The result is vr~ I/n, I- the current, n- the concentration of the ions. For the current I~ 0.1 A we have vr~ 10-7m/s. • We can also estimate the circular component of the velocity: v~ nvrB/, where - the viscosity of the sol ...
... • It’s not difficult to estimate the radial velocity of the ions of Na. The result is vr~ I/n, I- the current, n- the concentration of the ions. For the current I~ 0.1 A we have vr~ 10-7m/s. • We can also estimate the circular component of the velocity: v~ nvrB/, where - the viscosity of the sol ...
Teacher Notes PDF
... audio and video tapes, and credit cards. Storing magnets near compasses may result in permanent damage to the compasses. 7. Readings may fluctuate due to deviation, the influence of the immediate environment upon your sensor, caused by things such as electrical currents, computer monitors, or metal ...
... audio and video tapes, and credit cards. Storing magnets near compasses may result in permanent damage to the compasses. 7. Readings may fluctuate due to deviation, the influence of the immediate environment upon your sensor, caused by things such as electrical currents, computer monitors, or metal ...
Discussion 10
... -Power line: energy loss = resistance * current2 Energy transferred = voltage * current High voltage power lines are energy efficient ...
... -Power line: energy loss = resistance * current2 Energy transferred = voltage * current High voltage power lines are energy efficient ...
Discussion 11
... -Power line: energy loss = resistance * current2 Energy transferred = voltage * current High voltage power lines are energy efficient ...
... -Power line: energy loss = resistance * current2 Energy transferred = voltage * current High voltage power lines are energy efficient ...
Lecture 7 Extra
... Contains the force unit N for Newton and the unit A is the Ampere, the unit of electric current. With the magnetic permeability established, the electric permittivity takes the value given by the relationship ...
... Contains the force unit N for Newton and the unit A is the Ampere, the unit of electric current. With the magnetic permeability established, the electric permittivity takes the value given by the relationship ...
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... x-‐y-‐plane ( = plane of the drawing), is subject to a magnetic field, with the magnetic field vector B in the x-‐y-‐plane, at an angle of +130o above the (+x)-‐direction. Find ...
... x-‐y-‐plane ( = plane of the drawing), is subject to a magnetic field, with the magnetic field vector B in the x-‐y-‐plane, at an angle of +130o above the (+x)-‐direction. Find ...
unit62ppt - Macmillan Academy
... The motor only turns efficiently if the coil is 90 degrees to the magnetic field If the magnets have curved faces and the coil is also cylindrical then it will always be 90 degrees to the magnet We say it has a radial field ...
... The motor only turns efficiently if the coil is 90 degrees to the magnetic field If the magnets have curved faces and the coil is also cylindrical then it will always be 90 degrees to the magnet We say it has a radial field ...
Electromagnetic Induction - Lompoc Unified School District
... A conductive wire consisting of 3 loops and enclosing an area of .020 m2 is perpendicular to a uniform magnetic field of .030T. If the field goes to zero in .0045sec, what is the magnitude of the induced emf? ...
... A conductive wire consisting of 3 loops and enclosing an area of .020 m2 is perpendicular to a uniform magnetic field of .030T. If the field goes to zero in .0045sec, what is the magnitude of the induced emf? ...
powerpoint for review
... Alpha particles of charge q = + 2e and mass m = 6.6 x 10-27 kg are emitted from a radioactive source at a speed of 1.6 x 107 m/s. What magnetic field strength would be required to bend these into a circular path of radius r = 0.25 m? ...
... Alpha particles of charge q = + 2e and mass m = 6.6 x 10-27 kg are emitted from a radioactive source at a speed of 1.6 x 107 m/s. What magnetic field strength would be required to bend these into a circular path of radius r = 0.25 m? ...
Ferrofluid
A ferrofluid (portmanteau of ferromagnetic and fluid) is a liquid that becomes strongly magnetized in the presence of a magnetic field.Ferrofluid was invented in 1963 by NASA's Steve Papell as a liquid rocket fuel that could be drawn toward a pump inlet in a weightless environment by applying a magnetic field.Ferrofluids are colloidal liquids made of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a carrier fluid (usually an organic solvent or water). Each tiny particle is thoroughly coated with a surfactant to inhibit clumping. Large ferromagnetic particles can be ripped out of the homogeneous colloidal mixture, forming a separate clump of magnetic dust when exposed to strong magnetic fields. The magnetic attraction of nanoparticles is weak enough that the surfactant's Van der Waals force is sufficient to prevent magnetic clumping or agglomeration. Ferrofluids usually do not retain magnetization in the absence of an externally applied field and thus are often classified as ""superparamagnets"" rather than ferromagnets.The difference between ferrofluids and magnetorheological fluids (MR fluids) is the size of the particles. The particles in a ferrofluid primarily consist of nanoparticles which are suspended by Brownian motion and generally will not settle under normal conditions. MR fluid particles primarily consist of micrometre-scale particles which are too heavy for Brownian motion to keep them suspended, and thus will settle over time because of the inherent density difference between the particle and its carrier fluid. These two fluids have very different applications as a result.