phy1020.DVI

31.9 Magnetic Field of a Solenoid Asolenoidis a long coil of wire. Just as a parallel-plate capacitor gives a nearly uniform ele ...

Note again the presence of the vector cross productin this equation: the direction ofwill be perpendicular to the plane contai ...

Chapter 32 The Lorentz Force When we place an electric charge in an electric field, or a magnetic pole in a magnetic field, the ...

What if the initial velocity of the charged particle is not necessarily perpendicular to the magnetic field B? In that case, the ...

Figure 32.1: The Hall effect. (Ref. [13]) If the two currentsI 1 andI 2 are in thesamedirection, the wires willattract; if the c ...

physicist J.J. Thompson. Because of the electric field built up across the conducting strip, there is a potential difference acr ...

Chapter 33 Geomagnetism 33.1 Earth’s Magnetic Dipole The Earth generates its own internal magnetic field, which is thought to be ...

because the Earth’s magnetic dipole is not aligned with the geographic axis, but is tilted at some angle. The magneticSpole is c ...

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33.4 Magnetic Reversals As mentioned earlier, the Earth’s geographicnorthpole is a magneticSpole. This hasn’t always been the ca ...

Figure 33.3: History of geomagnetic reversals, going back to the late Cretaceous period. The scale on the right shows time in mi ...

Figure 33.4: The direction of the past geomagnetic field is recorded in the Earth’s crust on either side of the mid-Atlantic rid ...

Figure 33.6: Aurora borealis over Bear Lake, Eielson Air Force Base, near Fairbanks, Alaska. (Credit: Joshua Strang, USAF, Wikip ...

regions. These energetic particles excite the oxygen and nitrogen atoms in the atmosphere, producing the green and red lights of ...

11:11:01 11:17:09 11:23:16 11:29:24 11:35:32 11:41:40 11:47:48 11:53:56 12:00:03 Figure 33.7: The aurora borealis as seen from a ...

Figure 33.8: Auroral oval at Saturn’s pole, taken in ultraviolet light by the Hubble Space Telescope. (Credit: NASA.) ...

Chapter 34 Magnetic Materials Generally every material responds to a magnetic field in one way or another: materials may be weak ...

Figure 34.1: Hysteresis in a ferromagnetic material. The vertical axis (labeledD) is the internal magnetic field induced in the ...

Table 34-1. Curie temperatures for ferromagnetic elements. Element Curie temperature (ıC) Iron 770 Cobalt 1115 Nickel 354 Gadoli ...

Chapter 35 Ampere’s Law` In Chapter 31 we introduced the Biot-Savart law, which gives the magnetic field produced by a short cur ...