
Field Intensity Lines and Field Potential Lines - ND
... Two students perform a Millikan-type experiment using spherical plastic beads. The apparatus is set up as shown below, and a bead is suspended between the parallel plates. Evaluate the students' four results. Justify your evaluation of each ...
... Two students perform a Millikan-type experiment using spherical plastic beads. The apparatus is set up as shown below, and a bead is suspended between the parallel plates. Evaluate the students' four results. Justify your evaluation of each ...
Electromagnetic Waves
... An electromagnetic wave consists of oscillating electric and magnetic fields traveling at the speed of light. The wave carries both energy and momentum. The intensity of the wave, which is power per unit area, is given by ...
... An electromagnetic wave consists of oscillating electric and magnetic fields traveling at the speed of light. The wave carries both energy and momentum. The intensity of the wave, which is power per unit area, is given by ...
CHAPTER 22 SOLUTION FOR PROBLEM 19 (a) The linear charge
... The particles are equidistance from P and their charges have the same magnitude. The y components of their fields sum to zero and their x components are the same, so you need calculate only the x component of one of the fields, then double it. The x component of the field of either particle is given ...
... The particles are equidistance from P and their charges have the same magnitude. The y components of their fields sum to zero and their x components are the same, so you need calculate only the x component of one of the fields, then double it. The x component of the field of either particle is given ...
A wire loop, 1.5 meters by 3 meters, of negligible resistance is in the
... 8-ohm resistor is connected between points X and Y. The field is zero outside the region enclosed by the dashed lines. The loop is being pushed to the left with a constant velocity of 2 meters per second. Make all determinations for the time that the right end of the loop is still out the field. ...
... 8-ohm resistor is connected between points X and Y. The field is zero outside the region enclosed by the dashed lines. The loop is being pushed to the left with a constant velocity of 2 meters per second. Make all determinations for the time that the right end of the loop is still out the field. ...
Field (physics)
In physics, a field is a physical quantity that has a value for each point in space and time. For example, on a weather map, the surface wind velocity is described by assigning a vector to each point on a map. Each vector represents the speed and direction of the movement of air at that point. As another example, an electric field can be thought of as a ""condition in space"" emanating from an electric charge and extending throughout the whole of space. When a test electric charge is placed in this electric field, the particle accelerates due to a force. Physicists have found the notion of a field to be of such practical utility for the analysis of forces that they have come to think of a force as due to a field.In the modern framework of the quantum theory of fields, even without referring to a test particle, a field occupies space, contains energy, and its presence eliminates a true vacuum. This lead physicists to consider electromagnetic fields to be a physical entity, making the field concept a supporting paradigm of the edifice of modern physics. ""The fact that the electromagnetic field can possess momentum and energy makes it very real... a particle makes a field, and a field acts on another particle, and the field has such familiar properties as energy content and momentum, just as particles can have"". In practice, the strength of most fields has been found to diminish with distance to the point of being undetectable. For instance the strength of many relevant classical fields, such as the gravitational field in Newton's theory of gravity or the electrostatic field in classical electromagnetism, is inversely proportional to the square of the distance from the source (i.e. they follow the Gauss's law). One consequence is that the Earth's gravitational field quickly becomes undetectable on cosmic scales.A field can be classified as a scalar field, a vector field, a spinor field or a tensor field according to whether the represented physical quantity is a scalar, a vector, a spinor or a tensor, respectively. A field has a unique tensorial character in every point where it is defined: i.e. a field cannot be a scalar field somewhere and a vector field somewhere else. For example, the Newtonian gravitational field is a vector field: specifying its value at a point in spacetime requires three numbers, the components of the gravitational field vector at that point. Moreover, within each category (scalar, vector, tensor), a field can be either a classical field or a quantum field, depending on whether it is characterized by numbers or quantum operators respectively. In fact in this theory an equivalent representation of field is a field particle, namely a boson.