|
问题 |
答案 |
|
开始学习
|
|
electric charge, n. Physical property of matter, that causes attraction while placed in an electromagnetic field
|
|
|
|
开始学习
|
|
Electron, n. Stable negatively charged elementary particle
|
|
|
|
开始学习
|
|
Proton, n Stable positively charged elementary particle. The electric charge of an proton is equal to absolute electrons charge
|
|
|
|
开始学习
|
|
Conductor, n A matter that conduct electricity
|
|
|
|
开始学习
|
|
Insulator, n A matter, that hinder the free flow of electrons between particles of system
|
|
|
|
开始学习
|
|
Grounded, adj A process by which charges are transferred from a device to the earth
|
|
|
|
开始学习
|
|
Coulomb’s law Physical law that describe the force of interaction between point electric charges, depending on the distance between them
|
|
|
|
开始学习
|
|
electric field, n The field that surrounds electrically charged particles
|
|
|
|
开始学习
|
|
electric potential, n The amount of work energy needed per unit of electric charge to move this charge from one point to another
|
|
|
|
开始学习
|
|
potential difference, n Electrical voltage between points A and B
|
|
|
|
开始学习
|
|
mechanical energy, n The sum of potential and kinetic energies
|
|
|
|
开始学习
|
|
equipotential line, n Lines where the voltage does not change when moving
|
|
|
|
开始学习
|
|
Capacitor, n Device that stores electrical energy
|
|
|
|
开始学习
|
|
Capacitance, n Capacitance is a measure of an object’s ability to store electrical charge when a potential difference (voltage) is applied across it
|
|
|
|
开始学习
|
|
electric current, n The flow of charged particles
|
|
|
|
开始学习
|
|
Ampere, n The unit of measurement of electric current in the SI
|
|
|
|
开始学习
|
|
drift velocity, n The average velocity of particle motion acquired as a result of exposure to an electric field
|
|
|
|
开始学习
|
|
Ohm’s law, n Electrical current flowing through any conductor is directly proportional to the potential difference between its ends
|
|
|
|
开始学习
|
|
Resistance, n Object’s ability to oppose the influence of external forces acting upon it
|
|
|
|
开始学习
|
|
simple circuit, n A simple electrical circuit consists of three main elements: a current source wiring, and an electrical load
|
|
|
|
开始学习
|
|
Ferromagnetic adj, n Substances that form permanent magnets or attracted to magnets
|
|
|
|
开始学习
|
|
Domain, n Particles that randomly oriented in an unmagnetized ferromagnetic object
|
|
|
|
开始学习
|
|
magnetic monopoles, n A hypothetical elementary particle with a nonzero magnetic charge
|
|
|
|
开始学习
|
|
magnetic field, n Vector field that describes the magnetic influence on moving electric charges
|
|
|
|
开始学习
|
|
Tesla, n Unit of magnetic flux density in the SI
|
|
|
|
开始学习
|
|
Gauss, n Unit of measurement of magnetic induction
|
|
|
|
开始学习
|
|
Ray, n Beam of light or radiation
|
|
|
|
开始学习
|
|
law of reflection, n Angle of incidence is equal to the angle of reflection
|
|
|
|
开始学习
|
|
Refraction, n Bending of a wave when it passes from one medium to another
|
|
|
|
开始学习
|
|
index of refraction, n Ratio between the speed of light in a vacuum and the speed of light in a given material
|
|
|
|
开始学习
|
|
Dispersion, n Dependence of a physical quantity on the frequency of a wave
|
|
|
|
开始学习
|
|
converging lens, n A piece of glass that collect all parallel rays in one point
|
|
|
|
开始学习
|
|
diverging lens, n A piece of glass that scatters all parallel rays
|
|
|
|
开始学习
|
|
focal point, n Point in space at which light incident towards the mirror and traveling parallel to the principal axis will meet after refraction
|
|
|
|
开始学习
|
|
focal length, n Unit of measurement of how strongly the system converges or diverges light
|
|
|
|
开始学习
|
|
real image, n Image that arise on the opposite side of the rays hitting the lens
|
|
|
|
开始学习
|
|
virtual image, n Image that arise on the side of the rays hitting the lens
|
|
|
