Electric Fields
... electric field inside any good conductor is zero - charge distributes itself evenly over the surface of a conductor making the net field inside zero Electric field is always perpendicular to the surface of a conductor Excess charge tends to accumulate on sharp points or areas of greatest ...
... electric field inside any good conductor is zero - charge distributes itself evenly over the surface of a conductor making the net field inside zero Electric field is always perpendicular to the surface of a conductor Excess charge tends to accumulate on sharp points or areas of greatest ...
Day23,Oct24: Time Varying Fields
... Time varying sources: Coupling E and B fields • Maxwell’s equations need to be modified for time-varying sources and fields. The divergence equations stay the same, but the curls change. The curls of the electric and magnetic fields each picks up a source time proportional to the time-derivative of ...
... Time varying sources: Coupling E and B fields • Maxwell’s equations need to be modified for time-varying sources and fields. The divergence equations stay the same, but the curls change. The curls of the electric and magnetic fields each picks up a source time proportional to the time-derivative of ...
Document
... the approximate appearance of the electric field around the fixed charges in each part of the figure below. Include arrows to show the directions of the field lines. ...
... the approximate appearance of the electric field around the fixed charges in each part of the figure below. Include arrows to show the directions of the field lines. ...
UNIVERSITY OF LEIPZIG
... field energy per unit volume in the wave. (b) In the neighborhood of the earth the flux of electromagnetic energy from the sun is approximately 1.4 kW/m2 . If an interplanetary “sailplane” had a sail of 1 g/m2 of area and negligible other weight, what would be its maximum acceleration in meters per ...
... field energy per unit volume in the wave. (b) In the neighborhood of the earth the flux of electromagnetic energy from the sun is approximately 1.4 kW/m2 . If an interplanetary “sailplane” had a sail of 1 g/m2 of area and negligible other weight, what would be its maximum acceleration in meters per ...
Answers to The Electric field Homework
... 32.For the net field to be zero at point P, the magnitudes of the fields created by Q1 and Q2 must be equal. Also, the distance x will be taken as positive to the left of Q1. That is the only region where the total field due to the two charges can be zero. Let the variable Q Q2 E1 = E2 ® k 21 = k x ...
... 32.For the net field to be zero at point P, the magnitudes of the fields created by Q1 and Q2 must be equal. Also, the distance x will be taken as positive to the left of Q1. That is the only region where the total field due to the two charges can be zero. Let the variable Q Q2 E1 = E2 ® k 21 = k x ...
Physics Lecture #33 - WordPress for academic sites @evergreen
... b) An electric field pointing out of the page in a region of space is shown (for example, created by the parallel plates of a capacitor). The electric field is decreasing in strength. What direction is the accompanying magnetic field at the point P? ...
... b) An electric field pointing out of the page in a region of space is shown (for example, created by the parallel plates of a capacitor). The electric field is decreasing in strength. What direction is the accompanying magnetic field at the point P? ...
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.