PHYS4210 Electromagnetic Theory Quiz 26 Jan 2009
... A. points radially outward and falls like 1/r. B. points radially outward and falls like 1/r2 . C. points radially inward and falls like 1/r. D. points radially inward and falls like 1/r2 . E. falls like 1/rn+1 for a multipole of order n. 2. A charge q moves at some velocity v relative to a wire car ...
... A. points radially outward and falls like 1/r. B. points radially outward and falls like 1/r2 . C. points radially inward and falls like 1/r. D. points radially inward and falls like 1/r2 . E. falls like 1/rn+1 for a multipole of order n. 2. A charge q moves at some velocity v relative to a wire car ...
03AP_Physics_C_-_Gauss_Law
... cross product between the electric field and a differential amount of area. Since you want the total flux, you integrate to sum up all the small areas. Thus the TOTAL FLUX is found by integrating over the ENTIRE SURFACE. The circle on the integration sign simply means the surface is CLOSED!!. ...
... cross product between the electric field and a differential amount of area. Since you want the total flux, you integrate to sum up all the small areas. Thus the TOTAL FLUX is found by integrating over the ENTIRE SURFACE. The circle on the integration sign simply means the surface is CLOSED!!. ...
Magnetic Force
... 3.0 T uniform magnetic field pointing horizontally north in the gap between its poles. A proton enters the field heading north at a downward 30° angle with a speed of 5.0 x 106 m/s. Find the magnitude and direction of the force. ...
... 3.0 T uniform magnetic field pointing horizontally north in the gap between its poles. A proton enters the field heading north at a downward 30° angle with a speed of 5.0 x 106 m/s. Find the magnitude and direction of the force. ...
Topic 9.3 Electric Field, Potential, and Energy
... a constant value are called equipotentials. The places where the potential is constant in three dimensions are called equipotential surfaces, and where they are constant in two dimensions they are called equipotential lines. • They are in some ways analogous to the contour lines on topographic maps ...
... a constant value are called equipotentials. The places where the potential is constant in three dimensions are called equipotential surfaces, and where they are constant in two dimensions they are called equipotential lines. • They are in some ways analogous to the contour lines on topographic maps ...
Basic Electronics
... The ability of an electric charge to attract or repel another charge is a physical force. All the lines form the electric field. The lines and the field are imaginary, since they cannot be seen. The force decreases inversely as the square of the distance. The larger the charge, the greater the fo ...
... The ability of an electric charge to attract or repel another charge is a physical force. All the lines form the electric field. The lines and the field are imaginary, since they cannot be seen. The force decreases inversely as the square of the distance. The larger the charge, the greater the fo ...
Charge
... can be transferred from one object to another. Eg. Rubbing a rod with fur – electrons transfer from fur to rod, leaving rod negatively charged, and fur with exactly same magnitude of positive charge. ...
... can be transferred from one object to another. Eg. Rubbing a rod with fur – electrons transfer from fur to rod, leaving rod negatively charged, and fur with exactly same magnitude of positive charge. ...
24.2 gauss`s law
... The goal in this type of calculation is to determine a surface that satisfies one or more of the following conditions: 1.The value of the electric field can be argued by symmetry to be constant over the surface. 2. The dot product in Equation 24.6 can be expressed as a simple algebraic product E dA ...
... The goal in this type of calculation is to determine a surface that satisfies one or more of the following conditions: 1.The value of the electric field can be argued by symmetry to be constant over the surface. 2. The dot product in Equation 24.6 can be expressed as a simple algebraic product E dA ...
Announcements
... l So we’re going to replace the idea of action at a distance by the concept of a field l Particles don’t interact directly with each other l They create fields which then interact with the other particles ◆ we will need this when we start talking about dynamic situations l We’ll be dealing ...
... l So we’re going to replace the idea of action at a distance by the concept of a field l Particles don’t interact directly with each other l They create fields which then interact with the other particles ◆ we will need this when we start talking about dynamic situations l We’ll be dealing ...
Electrostatics
Electrostatics is a branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges with no acceleration.Since classical physics, it has been known that some materials such as amber attract lightweight particles after rubbing. The Greek word for amber, ήλεκτρον electron, was the source of the word 'electricity'. Electrostatic phenomena arise from the forces that electric charges exert on each other. Such forces are described by Coulomb's law.Even though electrostatically induced forces seem to be rather weak, the electrostatic force between e.g. an electron and a proton, that together make up a hydrogen atom, is about 36 orders of magnitude stronger than the gravitational force acting between them.There are many examples of electrostatic phenomena, from those as simple as the attraction of the plastic wrap to your hand after you remove it from a package, and the attraction of paper to a charged scale, to the apparently spontaneous explosion of grain silos, the damage of electronic components during manufacturing, and the operation of photocopiers. Electrostatics involves the buildup of charge on the surface of objects due to contact with other surfaces. Although charge exchange happens whenever any two surfaces contact and separate, the effects of charge exchange are usually only noticed when at least one of the surfaces has a high resistance to electrical flow. This is because the charges that transfer to or from the highly resistive surface are more or less trapped there for a long enough time for their effects to be observed. These charges then remain on the object until they either bleed off to ground or are quickly neutralized by a discharge: e.g., the familiar phenomenon of a static 'shock' is caused by the neutralization of charge built up in the body from contact with insulated surfaces.