Document
... A magnetic field can produce a torque on a current loop In a practical motor, a solenoid is used instead of a single loop Additional set-up is needed to keep the shaft rotating Electric generators are motors in reverse A generator produces an electric current by rotating a coil between the ...
... A magnetic field can produce a torque on a current loop In a practical motor, a solenoid is used instead of a single loop Additional set-up is needed to keep the shaft rotating Electric generators are motors in reverse A generator produces an electric current by rotating a coil between the ...
Introducing Faraday`s Law - United States Naval Academy
... Leibnitz rule, but rather by the Principle of Relativity. Introductory presentations should give the distinct natures of the two phenomena the same weight that is given to their unity. Motional emfs cannot, in general, be transformed into examples of induction as there is no requirement that every p ...
... Leibnitz rule, but rather by the Principle of Relativity. Introductory presentations should give the distinct natures of the two phenomena the same weight that is given to their unity. Motional emfs cannot, in general, be transformed into examples of induction as there is no requirement that every p ...
Magnetism - APlusPhysics
... AP-C Objectives (from College Board Learning Objectives for AP Physics) 1. Forces on moving charges in magnetic fields a. Calculate the magnitude and direction of the force in terms of q, v, and B, and explain why the magnetic force can perform no work. b. Deduce the direction of a magnetic field fr ...
... AP-C Objectives (from College Board Learning Objectives for AP Physics) 1. Forces on moving charges in magnetic fields a. Calculate the magnitude and direction of the force in terms of q, v, and B, and explain why the magnetic force can perform no work. b. Deduce the direction of a magnetic field fr ...
induced magnetic field - Southwest High School
... example above, you can see that the right side has one fifth the number of turns. As a result, the voltage on the right is only one-fifth as large. The voltage has been stepped down by a factor of five (1000 V down to 200 V). Because current is inversely proportional to voltage, you can see that ste ...
... example above, you can see that the right side has one fifth the number of turns. As a result, the voltage on the right is only one-fifth as large. The voltage has been stepped down by a factor of five (1000 V down to 200 V). Because current is inversely proportional to voltage, you can see that ste ...
θ B 21.2 Faraday’s Law of Induction and Lenz’s Law
... But, when this coil of wire is put in a circuit it has interesting effects because of Faraday’s Law and induced emf. If I changes in a single coil, then φB changes and an emf is induced in that same coil. This is known as self inductance ...
... But, when this coil of wire is put in a circuit it has interesting effects because of Faraday’s Law and induced emf. If I changes in a single coil, then φB changes and an emf is induced in that same coil. This is known as self inductance ...
Date Class Period
... PROBLEM: Can the strength of an electromagnet be changed by changing the voltage of the power source? Can the strength of an electromagnet be changed by changing the amount of wire wrapped around its core? BACKGROUND RESEARCH: 1. Heating or hitting a permanent magnet can ruin it. 2. Iron is a good m ...
... PROBLEM: Can the strength of an electromagnet be changed by changing the voltage of the power source? Can the strength of an electromagnet be changed by changing the amount of wire wrapped around its core? BACKGROUND RESEARCH: 1. Heating or hitting a permanent magnet can ruin it. 2. Iron is a good m ...
Electric Current Creates Magnetic Field
... 3. Using tape, attach 2 D-cell batteries together to form one, 3-volt power source. Make sure the positive end of one battery is attached to the negative end of the other battery. 4. Using tape, attach the two wire leads from the nail to either end of the two D-cell battery power source. 5. Take a s ...
... 3. Using tape, attach 2 D-cell batteries together to form one, 3-volt power source. Make sure the positive end of one battery is attached to the negative end of the other battery. 4. Using tape, attach the two wire leads from the nail to either end of the two D-cell battery power source. 5. Take a s ...
Faraday`s law and magnetic inductance (Parallel Lab)
... of the flux of the magnetic field passing that surface’s area, ℰ = This statement is known as the Faraday’s law. ...
... of the flux of the magnetic field passing that surface’s area, ℰ = This statement is known as the Faraday’s law. ...
Space Physics Handout 2 : The Earth`s magnetosphere and
... the Sun; ionisation increases in the sunlit atmosphere and decreases on the shadowed side. The ionosphere extends to rather high altitudes and at low and mid-latitudes gradually merges into the plasmasphere which was mentioned above. At high latitudes plasma sheet electrons can precipitate along mag ...
... the Sun; ionisation increases in the sunlit atmosphere and decreases on the shadowed side. The ionosphere extends to rather high altitudes and at low and mid-latitudes gradually merges into the plasmasphere which was mentioned above. At high latitudes plasma sheet electrons can precipitate along mag ...
Electromagnetic Induction
... Steps in problem solving – Lenz’s Law 3. Use the right hand rule-1 to find the direction of the induced current 4. Always keep in mind that there are two magnetic fields a. An external field whose flux must be changed if it is to induce an electric current b. A magnetic field produced by the induced ...
... Steps in problem solving – Lenz’s Law 3. Use the right hand rule-1 to find the direction of the induced current 4. Always keep in mind that there are two magnetic fields a. An external field whose flux must be changed if it is to induce an electric current b. A magnetic field produced by the induced ...
exam i, physics 1306
... NOTE!!! Parts k & l are BONUS QUESTIONS, 5 POINTS EACH! k. To arrive at the relations known as Maxwell’s Equations, Maxwell made a modification to Ampère’s Law so that it’s form resembled (but wasn’t exactly the same as!) Faraday’s Law with the electric field E & the magnetic field B interchanged & ...
... NOTE!!! Parts k & l are BONUS QUESTIONS, 5 POINTS EACH! k. To arrive at the relations known as Maxwell’s Equations, Maxwell made a modification to Ampère’s Law so that it’s form resembled (but wasn’t exactly the same as!) Faraday’s Law with the electric field E & the magnetic field B interchanged & ...
Document
... • When an external magnetic field is applied to a diamagnetic substance, a weak magnetic moment is induced in the direction opposite the applied field • Diamagnetic substances are weakly repelled by a magnet – Weak, so only present when ferromagnetism or paramagnetism do not exist ...
... • When an external magnetic field is applied to a diamagnetic substance, a weak magnetic moment is induced in the direction opposite the applied field • Diamagnetic substances are weakly repelled by a magnet – Weak, so only present when ferromagnetism or paramagnetism do not exist ...
Blizzard Bag 1 - Maplewood Career Center
... magnetic poles obey the inverse-square law, and his results were confirmed by Charles Coulomb. The subjects of magnetism and electricity developed almost independently of each other until 1820, when a Danish physicist named Hans Christian Oersted discovered in a classroom demonstration that an elect ...
... magnetic poles obey the inverse-square law, and his results were confirmed by Charles Coulomb. The subjects of magnetism and electricity developed almost independently of each other until 1820, when a Danish physicist named Hans Christian Oersted discovered in a classroom demonstration that an elect ...
21.5-6
... ex. a) Find the velocity of the wire 3 sec after a current of 3A starts flowing through it, assuming the wire starts from rest and there is no friction. b) If the coefficient of static friction between the wire and the rails is µ s=0.4, what is the minimum current to start the wire moving? ...
... ex. a) Find the velocity of the wire 3 sec after a current of 3A starts flowing through it, assuming the wire starts from rest and there is no friction. b) If the coefficient of static friction between the wire and the rails is µ s=0.4, what is the minimum current to start the wire moving? ...
the magnetic field
... (a) Using the small compasses, determine what the North Magnetic Pole direction is and indicate it by drawing an arrow. Use more than one compass because some of the small (cheap!) compasses don’t always work properly. Compare your results with other tables. Be careful to keep away from other magnet ...
... (a) Using the small compasses, determine what the North Magnetic Pole direction is and indicate it by drawing an arrow. Use more than one compass because some of the small (cheap!) compasses don’t always work properly. Compare your results with other tables. Be careful to keep away from other magnet ...
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.