9.1, draw arrows to indicate the direction of the magnetic field..[1](ii) The magnetic field is reversed.State what happens, if anything, to the direction of the force on the wire.00 00..00000000000000000000000000000 00 ...[1](c)Fig. 9.2 shows a current-carrying coil in a magnetic fie...
Due to current induced in the shaft, current flows in the length of wire between the pulleys. This current is sensed by the other winding (5), whose output voltage is amplified (9) and rectified in a rectifier (10), whose output controls the attenuator. A difference in the resistance of...
求翻译:5.The resistance of any length of a conducting wire is easily measured by finding the potential difference in volts between its ends when a known current is flowing.是什么意思?待解决 悬赏分:1 - 离问题结束还有 5.The resistance of any length of a conducting wire is easily measured by...
30 A resistor with resistance R is made from a length L of resistance wire with a cross-sectional are a A. A second resistor with resistance 2R is made from a wire of the same material with a cross-sectional are a of % A.What length of wire is needed for the second resistor? A ...
First we have to understand the resistance of a wire for solving this problem: The resistance of wire is depends upon the material out of which the wire is made and also depends upon the length and cross-section area of the wire. Suppose L is the len...
10 A student investigates how the resistance of a piece of wire changes with voltage across the wire.The student connects an ammeter, a voltmeter, a battery, a variable resistor and the wire in an electrical circuit.(a)(i) Complete the diagram to show how the student should connect the ci...
If the diameter of a wire (conductor) is dimidiated , then its resistance: A Remains unchangable B is diminiated C Becomes two times greater D Becomes 4 times greater Homework Equations R=constant*length/Surface The Attempt at a Solution Cross sectional area=pi r^2=pi (D/2)^2=piD^2...
A wire has a resistance of 6 ohm it is stretched out to a new length which is three times its original length what is the resistance of the longer wire? assume uniform diameter.resistivity and density A wire has resistance R. A second of wire has twice the length, twic...
We increase the length of the wire, thus ___ its resistance. A. increased B. increasing C. increase D. to increase 相关知识点: 试题来源: 解析 B 句意:我们增加导线的长度,从而增加了导线的电阻。increasing是现在分词作结果状语。 反馈 收藏...
阻力a force that stops sth moving or makes it move more slowly 5. [u][c] 电阻the opposition of a substance or device to the flow of an electrical current 6. [singspv] (尤指敌占区的)秘密抵抗组织a secret organization that resists the authorities, especially in a country that an enemy ha...