英语翻译26.Magnetic Forces Imagine that a current-carrying wire is perpendicular to Earth’s magneticfield and runs east-west.If the current is east,in which direction is the force on the wire?27.Deflection A beam of electrons in a cathode-ray t

英语翻译26.Magnetic Forces Imagine that a current-carrying wire is perpendicular to Earth’s magneticfield and runs east-west.If the current is east,in which direction is the force on the wire?27.Deflection A beam of electrons in a cathode-ray t
英语翻译
26.Magnetic Forces Imagine that a current-carrying wire is perpendicular to Earth’s magneticfield and runs east-west.If the current is east,in which direction is the force on the wire?
27.Deflection A beam of electrons in a cathode-ray tube approaches the deflecting magnets.The north pole is at the top of the tube; the south pole is on the bottom.If you are looking at the tube from the
28.Galvanometers Compare the diagram of a gal- vanometer in Figure 24-18 on page 655 with the electric motor in Figure 24-20 on page 656.How is the galvanometer similar to an electric motor?How are they different?
29.Motors When the plane of the coil in a motor is perpendicular to the magneticfield,the forcesdo not exert a torque on the coil.Does this mean that the coil does not rotate?Explain.
30.Resistance A galvanometer requires 180 µA for full-scale deflection.What is the total resistance of the meter and the multiplier resistorfor a 5.0-V full-scale deflection?
31.
Critical Thinking How do you know that the
forces on parallel current-carrying wires are a
result of magnetic attraction between wires,and not a resultof electrostatics?Hint:Consider whatthe charges are like when the force is attractive.Thenconsider what the forces are when three wirescarry currents in the same direction.

英语翻译26.Magnetic Forces Imagine that a current-carrying wire is perpendicular to Earth’s magneticfield and runs east-west.If the current is east,in which direction is the force on the wire?27.Deflection A beam of electrons in a cathode-ray t
26磁力想象,一个载流导线垂直于地球的磁场和东西.如果当前是东方,在哪个方向上的力线吗?
27偏转一束电子在阴极射线管偏转磁铁.北极是顶部的管,南极在底部.如果你看的管（后面不完整的）
28电流计比较加的图- 655页图24-18 vanometer图24-20中的电动机在656页.检流计类似于一个电动马达吗?他们的区别是什么?
29汽车的飞机在电机垂直于磁场线圈,线圈forcesdo不施加扭矩.这是否意味着线圈不旋转?
30电阻式检流计需要180μA全面偏转.的总阻力计和乘数resistorfor 5.0 - v全面偏转吗?
31批判性思维你怎么知道平行载流导线的部队之间的磁引力线的结果,而不是结果静电学吗?提示:考虑什么指控的力量时就像有吸引力.Thenconsider部队是什么三wirescarry电流在同一方向.