Chap. 11 -- E-M wave..
... a) Consider the peak value in the pattern that you observe at t = 0.03 s. As time goes on, that peak value (with direction pointing upward) will reappear again at what value of t? b) The period of an e-m wave [symbol: T] is the elapsed time between two consecutive maxima in the magnitude of the elec ...
... a) Consider the peak value in the pattern that you observe at t = 0.03 s. As time goes on, that peak value (with direction pointing upward) will reappear again at what value of t? b) The period of an e-m wave [symbol: T] is the elapsed time between two consecutive maxima in the magnitude of the elec ...
sclecture6
... the vector p m * v e * A must be conserved during the application of a magnetic field The kinetic energy, , depends only upon m*v so if = f(m*v) before the field is applied we must write = f(p-e*A) after the field is applied Quantum mechanically we can replace p by the momentum ...
... the vector p m * v e * A must be conserved during the application of a magnetic field The kinetic energy, , depends only upon m*v so if = f(m*v) before the field is applied we must write = f(p-e*A) after the field is applied Quantum mechanically we can replace p by the momentum ...
electromagneticinduction1copy
... move from P to Q within the rod. The end P of the rod becomes positively charged while end Q becomes negatively charged, hence an electric field is set up within the rod which opposes the further downward movement of electrons i.e. an equilibrium is reached and in equilibrium Fe = Fm i.e. eE = evB o ...
... move from P to Q within the rod. The end P of the rod becomes positively charged while end Q becomes negatively charged, hence an electric field is set up within the rod which opposes the further downward movement of electrons i.e. an equilibrium is reached and in equilibrium Fe = Fm i.e. eE = evB o ...
Slide 1
... Reminder: o The forces are equal and in the opposite direction o The form of the force law is: F = keq1q2/r2 o The nature of the interaction between charge is described using An electric field On a diagram the field is represented by lines emerge from a source (positive charge) end in a sin ...
... Reminder: o The forces are equal and in the opposite direction o The form of the force law is: F = keq1q2/r2 o The nature of the interaction between charge is described using An electric field On a diagram the field is represented by lines emerge from a source (positive charge) end in a sin ...
Questions 34-35
... 13. Two light wires are hung vertically. With electrical current in both wires directed upwards A) the wires will experience a force of attraction B) the wires will experience a force of repulsion C) the force on the right hand wire will cancel the force on the left hand wire D) both wires will expe ...
... 13. Two light wires are hung vertically. With electrical current in both wires directed upwards A) the wires will experience a force of attraction B) the wires will experience a force of repulsion C) the force on the right hand wire will cancel the force on the left hand wire D) both wires will expe ...
Fulltext PDF
... magnitude of the magnetoresistance is more than 100% at low temperatures. The French National Centre for Scientific Research (CNRS) has awarded the Medaille dOr (Golden Medal) for 2005 to Prof A Fert. Application of G MR in the read heads of computer discs was developed by IBM in 1997, using thin fi ...
... magnitude of the magnetoresistance is more than 100% at low temperatures. The French National Centre for Scientific Research (CNRS) has awarded the Medaille dOr (Golden Medal) for 2005 to Prof A Fert. Application of G MR in the read heads of computer discs was developed by IBM in 1997, using thin fi ...
Here
... The ideas and terms used in this project are fairly simple. By leaving a circuit running long enough it will cause the metal used in it to heat up and once it does a magnet will be placed in front to see if it retained it’s magnetism. The main terms used are heat, metal, magnets and electricity. The ...
... The ideas and terms used in this project are fairly simple. By leaving a circuit running long enough it will cause the metal used in it to heat up and once it does a magnet will be placed in front to see if it retained it’s magnetism. The main terms used are heat, metal, magnets and electricity. The ...
Module 21: Magnetic Field
... the collision. Assume the collision occurs during a heavy rainstorm and ignore friction forces between the vehicles and the wet road. An 8.00-g bullet is fired into a ballistic pendulum and lodges inside the 2-kg pendulum bob. (a) Find the ratio of the total kinetic energy after the collision to the ...
... the collision. Assume the collision occurs during a heavy rainstorm and ignore friction forces between the vehicles and the wet road. An 8.00-g bullet is fired into a ballistic pendulum and lodges inside the 2-kg pendulum bob. (a) Find the ratio of the total kinetic energy after the collision to the ...
Planetary magnetic signature of the storm wind disturbance
... influence the circulation of thermospheric neutral winds. Joule heating produces equatorward neutral winds at F-region heights with return flow at E-region altitudes around the equator, the so-called Hadley cell. The modified thermospheric circulation produces upwelling of molecule-enriched air at h ...
... influence the circulation of thermospheric neutral winds. Joule heating produces equatorward neutral winds at F-region heights with return flow at E-region altitudes around the equator, the so-called Hadley cell. The modified thermospheric circulation produces upwelling of molecule-enriched air at h ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.