Physics 2 - dhsphysics
... 1. What is the source of all magnetism? Include both ways? 2. What happens when like poles of a magnet are brought together? Unlike poles? 3. What happens to the poles of a magnet when it is broken in half? 4. How does a compass react when placed in a magnetic field? 5. How does the strength of a ma ...
... 1. What is the source of all magnetism? Include both ways? 2. What happens when like poles of a magnet are brought together? Unlike poles? 3. What happens to the poles of a magnet when it is broken in half? 4. How does a compass react when placed in a magnetic field? 5. How does the strength of a ma ...
Homework 9
... *1. (II) At a given instant, a 1.8-A current flows in the wires connected to a parallelplate capacitor. What is the rate at which the electric field is changing between the plates if the square plates are 1.60 cm on a side? Solution The current in the wires must also be the displacement current in t ...
... *1. (II) At a given instant, a 1.8-A current flows in the wires connected to a parallelplate capacitor. What is the rate at which the electric field is changing between the plates if the square plates are 1.60 cm on a side? Solution The current in the wires must also be the displacement current in t ...
EMlecture203
... once sinusoidal fields are created they can propagate on their own. These propagating fields are called electromagnetic waves. ...
... once sinusoidal fields are created they can propagate on their own. These propagating fields are called electromagnetic waves. ...
Name ______ period __
... 3. Magnetic Force - the ____________________ __________ exerted by magnets. It depends on: * the _______________ of the magnet * the ___________________ an object is from the magnet 4. Magnetic Poles - Magnets have a pair of _____________, a north pole and a south pole. Like poles _____________ (S/S ...
... 3. Magnetic Force - the ____________________ __________ exerted by magnets. It depends on: * the _______________ of the magnet * the ___________________ an object is from the magnet 4. Magnetic Poles - Magnets have a pair of _____________, a north pole and a south pole. Like poles _____________ (S/S ...
Electromagnetism_HW... - Jaclyn Kuspiel Murray
... Consider a current loop immersed in a magnetic field, as in the figure. It is given that B = 0.29 T and I = 9.5 A. In addition, the loop is a square 0.41 m on a side. Find the magnitude of the magnetic force exerted on each side of the loop. N (on top side) N (on bottom side) N (on left side) N (on ...
... Consider a current loop immersed in a magnetic field, as in the figure. It is given that B = 0.29 T and I = 9.5 A. In addition, the loop is a square 0.41 m on a side. Find the magnitude of the magnetic force exerted on each side of the loop. N (on top side) N (on bottom side) N (on left side) N (on ...
Electrical Control of Magnetism Boundary
... In a transistor, a voltage on the metal can induce flow of electricity between the two other contacts called the source (In) and drain (Out). In ...
... In a transistor, a voltage on the metal can induce flow of electricity between the two other contacts called the source (In) and drain (Out). In ...
File
... •The stronger the current the stronger the magnetic field will be. •When a current stops flowing there is no magnetic field ...
... •The stronger the current the stronger the magnetic field will be. •When a current stops flowing there is no magnetic field ...
Superconductivity
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. Liquid nitrogen boils at 77 K, and superconduction at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.