Atoms
Celestial Bodies
- Space Travel Equipment
- Stars
- Rotation and Revolution
- Relation Between Escape Velocity And Orbital Velocity
- Dwarf Planets
- Difference Between Solar Eclipse And Lunar Eclipse
- Difference Between Equinox And Solstice
- The Escape Velocity Of Earth
- Solar System
- Difference Between Stars And Planets
- Difference Between Asteroid And Meteoroid
- Constellations
Circuits
电路 (diàn lù)
电路 (Diànlù)
电路
通信系统Pdf
二极管
地球科学
电荷
电
- 类型的齿轮
- 电子产品在日常生活中
- 类型的汽车
- 类型的直流电机
- 类型的交流电机
- 晶体管工作
- 转矩电流环
- 电动机
- 电阻温度依赖性
- Rms值交流电
- 电抗和阻抗
- 相量表示法交流
- 平行板电容器
- 焦耳定律
- 电力
- 磁场对载流导线的影响
- 电流密度
- 导体绝缘体
- 导电
- 碳电阻器
- 直流发电机
- 类型的发电机
- 类型的电流
- 直流发电机类型
- Torque On Dipole
- 电流的热效应
- 电动发电机
- 静电
- 电阻率不同的材料
- 电场的物理意义
- 介电常数和磁导率
- 电能和权力
- 电流在导体
- 电动汽车
- 位移电流
- 电阻与电阻率之间的差异
- 电动机和发电机之间的区别
- 接地和接地之间的区别
- 电流线圈
- 水的电导率
- 导电的液体
Electricity
电磁波
电磁
静电学
能量
- 能量
- 能源类型
- 热能
- 太阳能项目
- 太阳能汽车
- Ev和Joule之间的关系
- 动能和完成的功
- 能量转换
- 一维和二维的弹性和非弹性碰撞
- 常规能源和非常规能源
- 太阳能炊具
- 潮汐能
- 能源
- 太阳能和光伏电池
- 动能与动量的关系
- 热量与焦耳的关系
- 能源及其对环境的影响
- 能源考虑
流体
武力
Force
摩擦
万有引力
热
动力学理论
光
- 镜面反射漫反射
- 人眼
- 结构人眼功能
- 阴影的形成
- 反射和折射之间的区别
- 相干源
- 光的透射、吸收和反射
- 透明半透明和不透明
- 阳光白色
- 单狭缝衍射
- 拉曼散射
- 粒子自然光光子
- 真实图像与虚拟图像的区别
- 衍射和干涉的区别
磁性
运动
- 运输历史记录
- 速度-时间图
- 旋转动能
- 刚体和刚体动力学
- 扭矩和速度之间的关系
- 粒子的直线运动
- 周期性运动
- 动量和惯性之间的差异
- 动量守恒
- 运动测量类型
- 扭矩
- 慢速和快速运动
- 滚动
- 刚体平移运动和旋转运动
- 相对速度
- 径向加速度
- 速度和速度之间的区别
- 动力学和运动学的区别
- 连续性方程
- 线性动量守恒
自然资源
核物理学
光学
Optics
- Reflection of Light and Laws of Reflection
- Concave Lens
- Total Internal Reflection
- Thin Lens Formula For Concave And Convex Lenses
- Spherical Mirror Formula
- Resolving Power Of Microscopes And Telescopes
- Refractive Index
- Refraction Of Light
- Refraction Light Glass Prism
- Reflection On A Plane Mirror
- Reflection Lateral Inversion
- Rainbow
- Photometry
- Difference Between Simple And Compound Microscope
- Difference Between Light Microscope And Electron Microscope
- Concave Convex Mirror
- Toric Lens
- The Lens Makers Formula
- Simple Microscope
Oscillation
Pressure
- Thrust Pressure
- Relation Between Bar And Pascal
- Regelation
- Sphygmomanometer
- Relation Between Bar And Atm
- Difference Between Stress And Pressure
Quantum physics
- Quantum physics
- Rydberg Constant
- Electron Spin
- Casimir Effect
- Relativity
- Quantum Mechanics
- Electrons And Photons
Radioactivity
- Relation Between Beta And Gamma Function
- Radioactivity Beta Decay
- Radioactive Decay
- Stefan Boltzmann Constant
- Radioactivity Gamma Decay
- Radioactivity Alpha Decay
- Radiation Detector
Scalars and Vectors
- Scalars and Vectors
- Triangle Law Of Vector Addition
- Scalar Product
- Scalar And Vector Products
- Difference Between Scalar And Vector
Scientific Method
- Scientific Methods
- Safety Measures Technology
- Difference Between Science And Technology
- Scientific Investigation
Semiconductors
- Semiconductor Devices
- Junction Transistor
- Semiconductor Diode
- Difference Between Npn And Pnp Transistor
Solid Deformation
- Solid State Physics
- Solid Deformation
- Stress
- Shear Modulus Elastic Moduli
- Relation Between Elastic Constants
- Elastic Behavior Of Solids
- Tensile Stress
- Stress And Strain
- Shearing Stress
- Elastomers
- Elastic Behaviour Of Materials
- Bulk Modulus Of Elasticity Definition Formula
Sound
- Sound waves
- Timbre
- Speed Of Sound Propagation
- Sound Waves Need Medium Propagation
- Sound Reflection
- Sound Produced Humans
- Doppler Shift
- Difference Between Sound Noise Music
- The Human Voice How Do Humans Create Sound With Their Vocal Cord
- Sound Vibration Propagation Of Sound
- Sound Produced Vibration Object
- Reverberation
- Doppler Effect
System of Particles and Rotational Dynamics
Thermal Properties of Matter
- Thermal Properties of Materials
- Thermal Stress
- Thermal Expansion Of Solids
- Thermal Conductivity Of Metals
Thermodynamics
- Statistical Physics
- SI Units List
- Statistical Mechanics
- Reversible Irreversible Processes
- Carnots Theorem
- Temperature
- Kelvin Planck Statement
- Difference between Isothermal and Adiabatic Processes
Units and measurements
- Density of Air
- The Idea Of Time
- Difference Between Pound And Kilogram
- Difference Between Mass And Volume
- Dimensional Analysis
- Density Of Water
- Time Measurement
- Standard Measurement Units
- Relation Between Kg And Newton
- Relation Between Density And Temperature
- Difference Between Mass And Weight
Waves
- Space Wave Propagation
- Sharpness Of Resonance
- Relation Between Group Velocity And Phase Velocity
- Relation Between Amplitude And Frequency
- Periodic Function
- P Wave
- Destructive Interference
- Transverse Waves
- Travelling Wave
- Standing Wave Normal Mode
- S Waves
- Relation Between Frequency And Velocity
- Reflection Of Waves
- Phase Angle
- Period Angular Frequency
Work, Energy and Power
- Derivation Of Work Energy Theorem
- Conservation Of Mechanical Energy
- Relation Between Work And Energy
- Destruction Caused Cyclones
Physics Experiments
- Determine Resistance Plotting Graph Potential Difference versus Current
- To find the weight of a given Body using Parallelogram Law of Vectors
- To study the variation in volume with pressure for a sample of air at constant temperature by plotting graphs between p and v
- To measure the thickness of sheet using Screw Gauge
- To find the value of V for different U values of Concave Mirror find Focal Length
- To find the Surface Tension of Water by Capillary Rise Method
- To find the Resistance of given wire using Metre Bridge and hence determine the Resistivity of its Material Experiment
- Determine Mass of Two Different Objects Using Beam Balance
- Tracing the path of the rays of light through a glass Prism
- Tracing path of a ray of light passing through a glass slab
- Tornado Bottle
- To find image distance for varying object distances of a convex lens with ray diagrams
- To find force constant of helical spring by plotting a graph between load and extension
- To find focal length of concave lens using convex lens
- To find effective length of seconds pendulum using graph
- To find downward force along inclined plane on a roller due to gravitational pull of the earth and its relationship with the angle of inclination
- To draw the IV characteristic curve for p n junction in forward and reverse bias
- To determine Young’s modulus of elasticity of the material of a given wire
- To determine the internal resistance of a given primary cell using a potentiometer experiment
- To determine the coefficient of viscosity of given viscous liquid by measuring terminal velocity of given spherical body
- To determine specific heat capacity of given solid by method of mixtures
- To determine radius of curvature of a given spherical surface by a Spherometer
- Scope and Excitement of Physics
- Rocket science
- Relationship between frequency and length of wire under constant tension using Sonometer
- To determine equivalent resistance of resistors when connected in series and in parallel
- To convert the given galvanometer of known resistance and figure of merit into a voltmeter of desired range and to verify the same experiment
- To determine minimum deviation for given prism by plotting graph between angle of incidence and angle of deviation
- To compare the emf of two given primary cells using potentiometer experiment
Introduction
当一个常数值的电流通过导体,同样安培的电流流过导体。流动的电流是相同的,但一些地区的部分可能有所不同。电流流动的宏观特性。
Current
电子的速度流在一个特定的电路或带电粒子叫做电流的流动。所代表的符号即和安培是一个标准的单位用来测量电流。当前总是在一个特定的方向流动。
Types of Current
目前可以分为两种类型:
Alternating Current(AC)
交流总是向相反的方向流动。
电流随时间的大小。
频率会有所不同,它总是高于零。
Direct Current(DC)
直流永远流在同一方向。
直流,流的大小总是恒定的。
频率将永远是零。
Images Coming soon
Current Density
当前或电荷流的流的特定部分导体电流密度可以表示。电子的流动一般是表示电流。
当电池的两端连接使用一个导体,电子从一侧的电池,在电池的另一端通过电线。如果电子流动的大小和方向不变,当前的价值也是常数。
Symbol and Unit of Current Density
电流密度的测量中扮演一个重要的角色在电磁学的概念。流动的电流密度是单位面积上的电荷的安培(A)在一个特定领域的横截面,即$ {m ^ 2} $。
J是符号用来代表电流密度
电流密度的大小和方向,所以它是一个矢量。电流密度的单位是安培/平方米(A / m <一口> 2 < /一口>)。的电荷电流的单位是单位时间(t)单位面积(A),它是测量垂直于方向流动的电流。
Formula for Current Density
当导体的电导率的材料常数σ,然后电流的密度可以与电场有关:
$mathrm{{J=Sigma imes E}}$
在哪里
J是电流密度,
Sigma ${(Sigma)}$ is conductivity,
E是电场
同样的,其他的表达方式的电流密度公式是:
J = I/A
在哪里
J是电流密度的A / m <一口> 2 < / >一同晚餐,
横截面积的是m <一口> 2 < /一口>
我表示流安培的电流通过导体(A)
Images Coming soon
Current Density Calculator
电流密度的测量电流密度在一个特定的单元。这也表示数量的电流通过导体的横截面。
这个公式来计算电流密度,J = I / A
寻找答案的典型单位(amp和m <一口> 2 < /一口>)很容易找到在电流密度计算器。
Example of Current Density
现在你知道的公式计算电流密度,看看这个例子得到一个清晰的理解计算电流密度。
20毫米2 <一口> < /一口>的铜线进行电流2,确定电流密度。
Current (I) = 2 x 10-3
Area A = 20 x 10-3
J = I/A
Current density (J) = 2 x 10-3 / 20 x 10-3
J = 0.10 A/m2
Things to Remember
电流被定义为带电粒子的流动。
目前有两种类型:AC和DC
通过任何电荷在导体截面的流动称为导体的电流密度。
电流密度的单位是美元mathrm {A / m ^ 2} $。电流密度的公式是J = I / A
FAQs
Q1。目前是什么?
Ans。电流流动的带电粒子,从大量的低数量的电子电子在一个原子。电流是由我这个词。
Q2。电流密度和电场之间的联系是什么?
Ans。电场和电流密度之间的连接是通过欧姆定律连接。
我们知道I = nEavd
I = nAe(eE/m)
电流密度J = I / A
现在,我/ = ne2 (E / m)
这就是为什么在电磁电流密度是非常重要的。电流密度与电场物理。
第三季。你如何定义电流密度?
答,电流密度是流经一个特定的横截面积的电荷量的导体。电荷的数量保持不变,如果流的稳定。当导体的横截面积变化,电流密度也不同。
第四季度。电流密度(J)如何与电导率有关吗?详细解释。
答,在电磁学的概念,计算电流的电流密度起着重要的作用。电流密度是指单位面积上的电荷流动安培的横截面,即美元mathrm {A / m ^ 2} $。
例如,
当导电材料的导电率由σ,然后电流密度与电场是由美元mathrm {{J =σime E}} $。
这就是电流密度和导电率相关。
Q5。电流密度的维数公式是什么?
答,电流密度维公式是由
L M <一口> 0 < /一口> <一口> 2 T <一口> < /一口> 0 < /一口> <一口> 1 < /一口>
在哪里
M, L、T和我是质量,长度、时间,分别和电流。