hw08_assingnment
... 2. At a given instant, a 1.8-A current flows in the wires connected to a parallel-plate capacitor. What is the rate at which the electric field is changing between the plates if the square plates are 1.60 cm on a side? 3. If the magnetic field in a traveling EM wave has a peak magnitude of 17.5 nT a ...
... 2. At a given instant, a 1.8-A current flows in the wires connected to a parallel-plate capacitor. What is the rate at which the electric field is changing between the plates if the square plates are 1.60 cm on a side? 3. If the magnetic field in a traveling EM wave has a peak magnitude of 17.5 nT a ...
hwk9
... 1. A positively charged particle is moving horizontally when it enters the region between the plates of a capacitor, as the drawing illustrates. (a) Draw the trajectory that the particle follows in moving through the capacitor. (b) When the particle is within the capacitor, which of the following fo ...
... 1. A positively charged particle is moving horizontally when it enters the region between the plates of a capacitor, as the drawing illustrates. (a) Draw the trajectory that the particle follows in moving through the capacitor. (b) When the particle is within the capacitor, which of the following fo ...
Problem Sheet 8
... (c) the –ve charge electrons move in the opposite direction to I. –e v x B points towards a where the electrons will accumulate. Thus Vb > Va 3. (a) Initially the electric field accelerates the particle upwards. It is then moving in a perpendicular B field that generates a force perpendicular to the ...
... (c) the –ve charge electrons move in the opposite direction to I. –e v x B points towards a where the electrons will accumulate. Thus Vb > Va 3. (a) Initially the electric field accelerates the particle upwards. It is then moving in a perpendicular B field that generates a force perpendicular to the ...
Midterm Exam No. 02 (Fall 2014) PHYS 520A: Electromagnetic Theory I
... Find the effective charge density by calculating −∇ · P. In particular, you should obtain two terms, one containing θ(R − r) that is interpreted as a volume charge density, and another containing δ(R − r) that can be interpreted as a surface charge density. 4. (25 points.) A particle of mass m and c ...
... Find the effective charge density by calculating −∇ · P. In particular, you should obtain two terms, one containing θ(R − r) that is interpreted as a volume charge density, and another containing δ(R − r) that can be interpreted as a surface charge density. 4. (25 points.) A particle of mass m and c ...
III
... 1. Always draw lines based on how a positive test charge would act. 2. field lines never cross 3. when more than 1 charge is present, lines interact causing curved patterns 4. Number of lines drawn is proportional to the charge 5. Field is strongest where the lines are close together. C. Electric Fi ...
... 1. Always draw lines based on how a positive test charge would act. 2. field lines never cross 3. when more than 1 charge is present, lines interact causing curved patterns 4. Number of lines drawn is proportional to the charge 5. Field is strongest where the lines are close together. C. Electric Fi ...
Activity 7: Field Lines and Coulomb`s Law
... - Lines start on (+) charges, end on (–) charges. Lines can go off to infinity. - At any point in space, the field lines follow the direction of the electric field. - Number of field lines on a charge is proportional to amount of charge. - Lines cannot split or merge, and tend to stay far away from ...
... - Lines start on (+) charges, end on (–) charges. Lines can go off to infinity. - At any point in space, the field lines follow the direction of the electric field. - Number of field lines on a charge is proportional to amount of charge. - Lines cannot split or merge, and tend to stay far away from ...
Course Outline - Madeeha Owais
... The definition of the magnetic field, the magnetic force on free charges and currents, Inductance Steady magnetic field ...
... The definition of the magnetic field, the magnetic force on free charges and currents, Inductance Steady magnetic field ...
1 P3323 momentum November 14, 2016 A long coaxial cable, of
... A long coaxial cable, of length l, consists of an inner conductor (radius a) and an outer conductor (radius b). It is connected to a battery at one end and a resistor at the other. The inner conductor carries a uniform charge per unit length λ, and a steady current I to the right; the outer conducto ...
... A long coaxial cable, of length l, consists of an inner conductor (radius a) and an outer conductor (radius b). It is connected to a battery at one end and a resistor at the other. The inner conductor carries a uniform charge per unit length λ, and a steady current I to the right; the outer conducto ...
Electric Fields
... on a drum attracting (-) charged ink particles. When a paper runs over the drum, the ink sticks to paper. Each ink particle has a mass of 9.0 x 10-16 kg and carries 20 electrons. In order to stick, the force of attraction must be at least 2x greater than its weight. What is the field strength at the ...
... on a drum attracting (-) charged ink particles. When a paper runs over the drum, the ink sticks to paper. Each ink particle has a mass of 9.0 x 10-16 kg and carries 20 electrons. In order to stick, the force of attraction must be at least 2x greater than its weight. What is the field strength at the ...
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.