A net flow of charge constitutes an electric current. It is as electric currents that charges are of greatest practical use. The chapter studies electric currents by introducing the ampere as the unit of electric current. One ampere equals a rate of charge flow of 1 C/s. The effect on ...
§4.磁场(magnetic field)对电流(electric current)的作用 一.对运动电荷的作用 1.洛仑兹力(Lorentz force):f = q v×B 大小: f = q v B sinθ 方向:右手螺旋法则(right-handed screw rule)( q>0 q<0) 2.运动轨迹(匀强磁场) V⊥B:匀速圆周运动 半径: 周期: 2.磁力矩(magnetic moment) ( 仅...
This chapter discusses the principles of magnetic field of electric current. Electric currents create magnetic fields. This discovery by Oersted has been described quantitatively in two distinct ways: (1) Biot and Savart proposed a relation in differential form that is somewhat analogous to a ...
相关推荐 1In this chapter we will___the magnetic effects of the electric current. A.deal withB.deal inC.trade withD.drop in 2In this chapter we will()the magnetic effects of the electric current. A. deal with B. deal in C. trade with D. drop in 反馈 ...
3.2.電流的磁效應(MagneticEffectofanElectricCurrent) 3.2.1.認識電荷運動和電流產生的 duetoMovingChargesorElectricCurrents l除咗磁鐵,科學家亦發現運動中嘅電荷同電流都會產生磁場 n依個就係“電流的磁效應”。 3.2.2.檢測載流長直導體、圓形線圈和長螺線管所產生的磁場 MagneticFieldpatternsAssociatedwithCurrents...
A. an electric current B. a piece of paper C. a book D. a pen 相关知识点: 试题来源: 解析 A。磁场是由电流产生的。选项 B 一张纸、选项 C 一本书和选项 D 一支笔都不能产生磁场。本题涉及物理知识点是磁场的产生,英语知识点是物品名称的表达。反馈 收藏 ...
Electric current is made up of moving charges that tend to produce magnetic fields due to the generation of magnetic dipoles. This generated magnetic field also exerts a force on nearby charges. This property can be used to our benefit in many ways.Complete step by step answer ...
'Magnetic ..The work is the first to make use of the magnetic monopoles(磁单极子) that exist in special crystals kno
Its electric power potential – infinitely high electric power potential with infinite energy density at the beginning of the big bang that can be decharged/decompressed into an electric current, and as we know from current understanding, every moving charge, every moving electric current creates a...
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