Electric Field: Sheet of Charge
... Q= σ A so that the flux is Φ= Q/ єo = σ A/ єo. Now definition of Flux is Φ= E2A (in this simple situation the field is perpendicular to surface of Gaussian cylinder so we can use simpler definition of Flux; the 2 comes from the fact we are looking at the flux above and below surface of plate). So we ...
... Q= σ A so that the flux is Φ= Q/ єo = σ A/ єo. Now definition of Flux is Φ= E2A (in this simple situation the field is perpendicular to surface of Gaussian cylinder so we can use simpler definition of Flux; the 2 comes from the fact we are looking at the flux above and below surface of plate). So we ...
Jean Brainard, Ph.D.
... Q: What is the charge of an oxide ion? How does its number of electrons compare to its number of protons? A: An oxide ion has a charge of -2. It has two more electrons than protons. How Ions Form ...
... Q: What is the charge of an oxide ion? How does its number of electrons compare to its number of protons? A: An oxide ion has a charge of -2. It has two more electrons than protons. How Ions Form ...
Lecture 21: Alternating Current Circuits and EM Waves
... 1) The E and B fields are always at right angles to each other. 2) The propagation of the fields, i.e., their direction of travel away from the oscillating dipole, is perpendicular to the direction in which the fields point at any given position in space. 3) In a location far from the dipole, the el ...
... 1) The E and B fields are always at right angles to each other. 2) The propagation of the fields, i.e., their direction of travel away from the oscillating dipole, is perpendicular to the direction in which the fields point at any given position in space. 3) In a location far from the dipole, the el ...
PS 6.11 - S2TEM Centers SC
... The armature spins because other magnets in the motor push and pull the armature and cause it to spin. Motors use the magnetic force from magnets to spin an armature (magnetized by an electric current) and thus change electric energy to mechanical energy. Generators: ○ A generator changes mech ...
... The armature spins because other magnets in the motor push and pull the armature and cause it to spin. Motors use the magnetic force from magnets to spin an armature (magnetized by an electric current) and thus change electric energy to mechanical energy. Generators: ○ A generator changes mech ...
HOTS Questions with Answers Magnetic Effects of Electric
... Answer: Electric power to homes is supplied through the mains. It has two wires. One is a live wire (positve wire) with red insulation and the other is a neutral wire (negative wire) with black insulation. The potential difference between the two wires is 220V. The earth wire with green insulation i ...
... Answer: Electric power to homes is supplied through the mains. It has two wires. One is a live wire (positve wire) with red insulation and the other is a neutral wire (negative wire) with black insulation. The potential difference between the two wires is 220V. The earth wire with green insulation i ...
Chapter2A 07_08
... current. In some cases, the charged matter constituting the convection current consists solely of charged particles, such as the electrons of an electron beam in a cathode ray tube (the picture tube of the television and computer monitors). Convection current is distinct from conduction current. I ...
... current. In some cases, the charged matter constituting the convection current consists solely of charged particles, such as the electrons of an electron beam in a cathode ray tube (the picture tube of the television and computer monitors). Convection current is distinct from conduction current. I ...
Energy flow and the speed of electric field in DC circuit
... therefore there is a Poynting vector directed radially inward, as shown in the figure. There is a flow of energy into the wire all around. It is, of course, equal to the energy being lost in the wire in the form of heat. So our "crazy" theory says that the electrons are getting their energy to gener ...
... therefore there is a Poynting vector directed radially inward, as shown in the figure. There is a flow of energy into the wire all around. It is, of course, equal to the energy being lost in the wire in the form of heat. So our "crazy" theory says that the electrons are getting their energy to gener ...
FREQUENTLY ASKED QUESTIONS Content
... field, you would call it a “motional emf”. For example, if a loop moves into or out of a region of field, or rotates, or a bar rolls along a rail, you’d get a “motional” induced emf. But if the changing magnetic flux were due to, say, an increasing current in a wire, you wouldn’t call it a “motional ...
... field, you would call it a “motional emf”. For example, if a loop moves into or out of a region of field, or rotates, or a bar rolls along a rail, you’d get a “motional” induced emf. But if the changing magnetic flux were due to, say, an increasing current in a wire, you wouldn’t call it a “motional ...
File
... A) Items to recall A) Conservative forces (1) Allow us to figure changes in energy levels B) Any change in position is final minus initial C) Work can be calculated by Force times distance, but what if force is non-constant B) Uniform Fields A) Our first analogy to gravitation (1) The gravitational ...
... A) Items to recall A) Conservative forces (1) Allow us to figure changes in energy levels B) Any change in position is final minus initial C) Work can be calculated by Force times distance, but what if force is non-constant B) Uniform Fields A) Our first analogy to gravitation (1) The gravitational ...
Electric current
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.Electric currents cause Joule heating, which creates light in incandescent light bulbs. They also create magnetic fields, which are used in motors, inductors and generators.The particles that carry the charge in an electric current are called charge carriers. In metals, one or more electrons from each atom are loosely bound to the atom, and can move freely about within the metal. These conduction electrons are the charge carriers in metal conductors.