Ch#28 - KFUPM Faculty List
... Q5. A particle (mass = 6.0 mg) moves with a speed of 4.0 km/s in a direction that makes an angle of 37 above the positive x axis in the x-y plane. At the instant it enters a magnetic field of (5.0 x 10-3 iˆ ) T, it experiences an acceleration of (8.0 k̂ ) m/s2. What is the charge of the particle? ( ...
... Q5. A particle (mass = 6.0 mg) moves with a speed of 4.0 km/s in a direction that makes an angle of 37 above the positive x axis in the x-y plane. At the instant it enters a magnetic field of (5.0 x 10-3 iˆ ) T, it experiences an acceleration of (8.0 k̂ ) m/s2. What is the charge of the particle? ( ...
Section 32.1 Self
... A large coil of radius R1 and having N1 turns is coaxial with a small coil of radius R2 and having N2 turns. The centers of the coils are separated by a distance x that is much larger than R1 and R2. What is the mutual inductance of the coils? Suggestion: John von Neumann proved that the same answer ...
... A large coil of radius R1 and having N1 turns is coaxial with a small coil of radius R2 and having N2 turns. The centers of the coils are separated by a distance x that is much larger than R1 and R2. What is the mutual inductance of the coils? Suggestion: John von Neumann proved that the same answer ...
electric current
... It tends to evaporate, i.e. to become thinner, thus decreasing in radius, and cross sectional area. Its resistance increases with time. The current going though the filament then decreases with time – and so does its luminosity. ...
... It tends to evaporate, i.e. to become thinner, thus decreasing in radius, and cross sectional area. Its resistance increases with time. The current going though the filament then decreases with time – and so does its luminosity. ...
Lecture 12 Chapter 26 Capacitance - Examples
... no net transport of charges – Same potential everywhere, no E field inside or on surface so no electric F on electrons ...
... no net transport of charges – Same potential everywhere, no E field inside or on surface so no electric F on electrons ...
3. Liquid crystals
... calculation of S as a function of u/kBT → character of transition → at u/kBT = 4.55 discontinuous change of S from 0 to 0.44 → first-order phase transition but: minimum of free energy shallow → fluctuations at transition important → weakly first oder transition ...
... calculation of S as a function of u/kBT → character of transition → at u/kBT = 4.55 discontinuous change of S from 0 to 0.44 → first-order phase transition but: minimum of free energy shallow → fluctuations at transition important → weakly first oder transition ...
Space Interpretation of Maxwell`s Equations
... forms depend on the system of units, environment and mathematical tools [1]. These equations were formulated by Maxwell more than 150 years ago and were modified by Heaviside later on. However, since that time and until now they are unchangeable; even the physical understanding of matter was changed ...
... forms depend on the system of units, environment and mathematical tools [1]. These equations were formulated by Maxwell more than 150 years ago and were modified by Heaviside later on. However, since that time and until now they are unchangeable; even the physical understanding of matter was changed ...
PHYS 1443 – Section 501 Lecture #1
... 26-2 Resistors in Series and in Parallel A series connection has a single path from the battery, through each circuit element in turn, then back to the battery. The current through each resistor is the same; the voltage drop depends on the resistance. The sum of the voltage drops across the resisto ...
... 26-2 Resistors in Series and in Parallel A series connection has a single path from the battery, through each circuit element in turn, then back to the battery. The current through each resistor is the same; the voltage drop depends on the resistance. The sum of the voltage drops across the resisto ...
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.