PPT - LSU Physics & Astronomy
... determine the field with much precision. One can do reasonably well with just a compass and a dip meter. The point where the field is perpendicular to Earth’s surface and inward is not located at the geomagnetic north pole off Greenland as ...
... determine the field with much precision. One can do reasonably well with just a compass and a dip meter. The point where the field is perpendicular to Earth’s surface and inward is not located at the geomagnetic north pole off Greenland as ...
Electromagnetic Induction
... • If two electrons are spinning the same way, they make a stronger magnet • If two electrons are spinning in opposite directions, their magnetic field cancels out (why most substances are not magnets) ...
... • If two electrons are spinning the same way, they make a stronger magnet • If two electrons are spinning in opposite directions, their magnetic field cancels out (why most substances are not magnets) ...
ph213_overhead_ch30
... – A B field can exert a force on an electric current (moving charge) – A changing B-field (such as a moving magnet) will exert a magnetic force on a static charge, producing an electric current → this is called electromagnetic induction ...
... – A B field can exert a force on an electric current (moving charge) – A changing B-field (such as a moving magnet) will exert a magnetic force on a static charge, producing an electric current → this is called electromagnetic induction ...
Ch.20 Induced voltages and Inductance Faraday`s Law
... Now the conductor is part of a closed loop. See pictures on page 667. Conducting bar of length L slides along two fixed parallel conducting rails. Let the stationary part of the loop have a resistance R. A uniform and constant B-field is perpendicular to the plane of the loop. As the bar is pulled ...
... Now the conductor is part of a closed loop. See pictures on page 667. Conducting bar of length L slides along two fixed parallel conducting rails. Let the stationary part of the loop have a resistance R. A uniform and constant B-field is perpendicular to the plane of the loop. As the bar is pulled ...
SP212E.1121 JVanhoy Test 2 – Magnetic Fields 27 Mar 03 You may
... C) the velocity of a moving positive charge D) the velocity of a moving negative charge E) none of the above 3. A magnetic field CANNOT: A) exert a force on a charge B) accelerate a charge C) change the momentum of a charge D) change the kinetic energy of a charge E) exist 4. At one instant an elect ...
... C) the velocity of a moving positive charge D) the velocity of a moving negative charge E) none of the above 3. A magnetic field CANNOT: A) exert a force on a charge B) accelerate a charge C) change the momentum of a charge D) change the kinetic energy of a charge E) exist 4. At one instant an elect ...
Electricity and Magnetism Study Guide
... LT 3: I can explain the relationship between electricity and magnetism. 8. Electricity and magnetism are like two sides of the same coin. In other words, electricity and magnetism are two aspects on one single force- the electromagnetic force. Why do we say this? Moving magnetic fields create elec ...
... LT 3: I can explain the relationship between electricity and magnetism. 8. Electricity and magnetism are like two sides of the same coin. In other words, electricity and magnetism are two aspects on one single force- the electromagnetic force. Why do we say this? Moving magnetic fields create elec ...
Magnetic anomalies produced by simple geological structures
... where k is the magnetic susceptibility of the pipe, A is the cross sectional area and BE is the strength of the Earth’s magnetic field. The vertical distance from top to bottom of the pipe is L. The top of the pipe is at a depth z below the surface. B ...
... where k is the magnetic susceptibility of the pipe, A is the cross sectional area and BE is the strength of the Earth’s magnetic field. The vertical distance from top to bottom of the pipe is L. The top of the pipe is at a depth z below the surface. B ...
exam2_solutions
... The increasing current in the wire creates increasing magnetic field and flux trough the loop. According to the right hand rule, this field is directed out of page. Because this field is increasing, the induced field should have opposite direction (into the page). According to right hand rule, this ...
... The increasing current in the wire creates increasing magnetic field and flux trough the loop. According to the right hand rule, this field is directed out of page. Because this field is increasing, the induced field should have opposite direction (into the page). According to right hand rule, this ...
Chapter 10 Magnetic Fields and Induction
... All magnets have magnetic field lines associated with them. Figure 10.1 shows how the magnetic field lines of a typical bar magnet are configured. Note how all of the lines point from North to South. This labeling of directions is purely conventional. It is simply the direction that a compass needle ...
... All magnets have magnetic field lines associated with them. Figure 10.1 shows how the magnetic field lines of a typical bar magnet are configured. Note how all of the lines point from North to South. This labeling of directions is purely conventional. It is simply the direction that a compass needle ...
word document - FacStaff Home Page for CBU
... smaller than the central or internal forces of the charged particles. Recall from the previous page: ma* = FC + ΣFi + (q²/4m){B [Br]}. If the applied magnetic field is weak, then the last term is very small (being of the order of B²) and can be neglected. If FC + ΣFi is negligible, then we have m ...
... smaller than the central or internal forces of the charged particles. Recall from the previous page: ma* = FC + ΣFi + (q²/4m){B [Br]}. If the applied magnetic field is weak, then the last term is very small (being of the order of B²) and can be neglected. If FC + ΣFi is negligible, then we have m ...
29a
... You are free to take any surface bounded by the loop as the surface over which to evaluate the integral. The result will always be the same, owing to the continuity of magnetic field lines (they never start or end anywhere, since there are no magnetic charges). It is important to understand the vast ...
... You are free to take any surface bounded by the loop as the surface over which to evaluate the integral. The result will always be the same, owing to the continuity of magnetic field lines (they never start or end anywhere, since there are no magnetic charges). It is important to understand the vast ...
Magnetic field
A magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H, where H is measured in units of amperes per meter (symbol: A·m−1 or A/m) in the SI. B is measured in teslas (symbol:T) and newtons per meter per ampere (symbol: N·m−1·A−1 or N/(m·A)) in the SI. B is most commonly defined in terms of the Lorentz force it exerts on moving electric charges.Magnetic fields can be produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin. In special relativity, electric and magnetic fields are two interrelated aspects of a single object, called the electromagnetic tensor; the split of this tensor into electric and magnetic fields depends on the relative velocity of the observer and charge. In quantum physics, the electromagnetic field is quantized and electromagnetic interactions result from the exchange of photons.In everyday life, magnetic fields are most often encountered as a force created by permanent magnets, which pull on ferromagnetic materials such as iron, cobalt, or nickel, and attract or repel other magnets. Magnetic fields are widely used throughout modern technology, particularly in electrical engineering and electromechanics. The Earth produces its own magnetic field, which is important in navigation, and it shields the Earth's atmosphere from solar wind. Rotating magnetic fields are used in both electric motors and generators. Magnetic forces give information about the charge carriers in a material through the Hall effect. The interaction of magnetic fields in electric devices such as transformers is studied in the discipline of magnetic circuits.