'Opposites attract'. You must have heard this phrase quite often. But why do opposites attract? Where did this phrase originate from? This phrase comes from the magnet and its magnetic field. The opposite poles of a magnet attract each other. Let us stud
网络磁力由磁场施加的力 网络释义 1. 磁力由磁场施加的力 ... A race for trotters. 赛马道The force exerted by a magnetic field.磁力由磁场施加的力A ball with bounce. 弹力球 ... www.1stenglish.com|基于8个网页
A.由于磁场变而产生的电动势不是感生电动势; The electromotive force due to the change of magnetic field is not Induced Electromotive Force;B.由于线圈(导体)动产生的电动势是动生电动势; The electromotive force produced by the coil (conductor) is Motional Electromotive Force.C.由于磁场变而产生的电动...
The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other. From this point of view, the magnetic force F on the second particle is proportional to its charge q2, the magnitude of its velocity v2, the ...
Here,ris the radius of curvature of the path of a charged particle with massmand chargeq, moving at a speedvperpendicular to a magnetic field of strengthB. If the velocity is not perpendicular to the magnetic field, thenvis the component of the velocity perpendicular ...
Lab on a Chip - Miniaturisation for Chemistry & BiologyShevkoplyas, S.S., Siegel, A.C., Westervelt, R.M., Prentiss, M.G., Whitesides, G.M., 2007. The force acting on a superparamagnetic bead due to an applied magnetic field. Lab Chip 7, 1294-1302....
A. 也称胎头水肿 B. 是胎头先露部淋巴液和血液淤积形成的皮下组织水肿 C. 可用于鉴别死产与活产 D. 是新生儿罕见的先天性恶性肿瘤 点击查看答案 单项选择题 阳树脂采用H 2SO 4再生时,树脂层中存在析出CaSO 4的可能性。( ) A. 对 B. 错 点击查看答案 ...
The instability due to vertical temperature gradient is studied in a rapidly rotating horizontal layer of an electrically conducting fluid permeated by an azimuthal magnetic field, which linearly grows with distance from the vertical rotation axis. Both boundaries of the layer are rigid and perfectly ...
A. Q点不变, 增大,由临界状态进入过压状态,集电极电流 下凹。 B. Q点不变, 增大,,由临界状态进入过压状态,集电极电流 仍为尖脉冲。 C. Q点不变, 减小,由临界状态进入欠压状态,集电极电流 仍为尖脉冲。 D. Q点不变, 减小,由临界状态进入欠压状态,集电极电流 ...
Force on a Wire in a Magnetic Field, Nature 246, 208 - Lowes - 1973 () Citation Context ... can be calculated via the interaction of the current and magnetization in the wire with only the fields present before the wire was added to the problem, as emphasized in sec. 35 of [18] ...