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物理:
The potential energy of a positive charge increases when it moves against an electric field, and decreases when it moves with the field. Electric potential can be thought of as potential energy per unit charge.
正电荷逆电场方向运动时,位能减少。电势可比作每单位电荷的位能。
属类：自然科学-物理-
The work done in moving a unit charge from one point to another, as in an electric circuit, is equal to the difference in potential energies at each point.
将单位电荷从一点移到另一点(如在电路中)所做的功即等于两点之间的位能差。
属类：自然科学-物理-
Electric potential is expressed in units of joules per coulomb, or volts.
在国际单位制中,电势的单位为焦耳)/库仑,简称伏特。
属类：自然科学-物理-
electromagnetic field : Property of space caused by the motion of an electric charge. A stationary charge produces an electric field in the surrounding space. If the charge is moving, a magnetic field is also produced. A changing magnetic field also produces an electric field.
电磁场由于电荷的运动所造成的一种空间特性。静止电荷只在其周围空间产生电场;运动电荷则同时产生磁场,磁场的变化也能产生电场。
属类：自然科学-物理-
The interaction of electric and magnetic fields produces an electromagnetic field, which has its own existence in space apart from the charges involved.
电磁场是由电场和磁场的交互作用产生的,被认为是离开电荷或电流在空间独立存在的。
属类：自然科学-物理-
An electromagnetic field can sometimes be described as a wave that transports electromagnetic radiation.
在某些情况下,电磁场可以被描述为一种输送电磁能量的波。
属类：自然科学-物理-
Electromagnetic induction: Induction of an electromotive force in a circuit by varying the magnetic flux linked with the circuit.
电磁感应:由于同电路耦合的磁通量的变化而在电路中产生的感应电动势。
属类：自然科学-物理-
The phenomenon was first investigated in 1830-31 by Joseph Henry and Michael Faraday, who discovered that when the magnetic field around an electromagnet was increased or decreased, an electric current could be detected in a separate nearby conductor.
这种现象是1830～1831年间约瑟夫?亨利和法拉第发现的。当磁铁周围的磁场由于接通或断开电路而出现或消失时,就可在附近的孤立导体回路中测到一个电流
属类：自然科学-物理-
A current can also be induced by constantly moving a permanent magnet in and out of a coil of wire, or by constantly moving a conductor near a stationary permanent magnet.
让永久磁铁在线圈中进出运动或让一个导体在固定的永久磁铁附近的区域移动,也会产生电流。
属类：自然科学-物理-
electromagnetic radiation: Energy propagated through free space or through a material medium in the form of electromagnetic waves. Examples include radio waves, infrared radiation, and gamma rays.
电磁辐射以电磁波方式在自由空间或实物媒质中传播的能量,例如无线电波、红外辐射、可见光和γ射线。
属类：自然科学-物理-
| 1 | 正电荷逆电场方向运动时,位能减少。电势可比作每单位电荷的位能。 | The potential energy of a positive charge increases when it moves against an electric field, and decreases when it moves with the field. Electric potential can be thought of as potential energy per unit charge. |
|
| 2 | 将单位电荷从一点移到另一点(如在电路中)所做的功即等于两点之间的位能差。 | The work done in moving a unit charge from one point to another, as in an electric circuit, is equal to the difference in potential energies at each point. |
|
| 3 | 在国际单位制中,电势的单位为焦耳)/库仑,简称伏特。 | Electric potential is expressed in units of joules per coulomb, or volts. |
|
| 4 | 电磁场由于电荷的运动所造成的一种空间特性。静止电荷只在其周围空间产生电场;运动电荷则同时产生磁场,磁场的变化也能产生电场。 | electromagnetic field : Property of space caused by the motion of an electric charge. A stationary charge produces an electric field in the surrounding space. If the charge is moving, a magnetic field is also produced. A changing magnetic field also produces an electric field. |
|
| 5 | 电磁场是由电场和磁场的交互作用产生的,被认为是离开电荷或电流在空间独立存在的。 | The interaction of electric and magnetic fields produces an electromagnetic field, which has its own existence in space apart from the charges involved. |
|
| 6 | 在某些情况下,电磁场可以被描述为一种输送电磁能量的波。 | An electromagnetic field can sometimes be described as a wave that transports electromagnetic radiation. |
|
| 7 | 电磁感应:由于同电路耦合的磁通量的变化而在电路中产生的感应电动势。 | Electromagnetic induction: Induction of an electromotive force in a circuit by varying the magnetic flux linked with the circuit. |
|
| 8 | 这种现象是1830～1831年间约瑟夫?亨利和法拉第发现的。当磁铁周围的磁场由于接通或断开电路而出现或消失时,就可在附近的孤立导体回路中测到一个电流 | The phenomenon was first investigated in 1830-31 by Joseph Henry and Michael Faraday, who discovered that when the magnetic field around an electromagnet was increased or decreased, an electric current could be detected in a separate nearby conductor. |
|
| 9 | 让永久磁铁在线圈中进出运动或让一个导体在固定的永久磁铁附近的区域移动,也会产生电流。 | A current can also be induced by constantly moving a permanent magnet in and out of a coil of wire, or by constantly moving a conductor near a stationary permanent magnet. |
|
| 10 | 电磁辐射以电磁波方式在自由空间或实物媒质中传播的能量,例如无线电波、红外辐射、可见光和γ射线。 | electromagnetic radiation: Energy propagated through free space or through a material medium in the form of electromagnetic waves. Examples include radio waves, infrared radiation, and gamma rays. |
|
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