电场和磁场的区别

电磁场，一种由电荷运动引起的空间特性。静止电荷只会在周围空间中产生电场。如果电荷在移动，也会产生磁场。电场也可以由变化的磁场产生。电场和磁场都是电磁场的组成部分。

这两个分量相对于电磁场的原因（例如，移动的电荷）占据不同的平面。这一点，以及产生场的电荷是静止的还是运动的，是唯一的区别。

磁场

磁极周围具有吸引力或排斥力的区域称为磁场。当电荷在空间或电导体中移动时，也会产生磁场。

磁场公式为：

Magnetic force (B) = μ0/2πr

B = refers to the magnetic field magnitude in Tesla (T)

μ0 = refers to the permeability of free space (4π×10−7T⋅m/A)

I = refers to the magnitude of the electric current in amperes (A)

r = refers to the distance in meters (m)

当电流通过磁性材料时，会产生磁场，如果将针放在材料附近，则在提供电荷（移动电荷）时，针会偏转。磁性材料施加力的点的区域称为磁场

磁场线

移动的电荷载流子和磁体产生磁力线，这些线称为磁力线。它是一个向量，因为它既有大小又有方向。符号 B 表示磁场，单位为特斯拉或牛顿每米。

Magnetic field = [M]¹[T]²[I]^-1  

问题1：磁场是什么意思？

解决方案：

The region around the magnetic where its poles exhibit a force of attraction or repulsion is called a magnetic field. The magnetic field also induces when the electric charges are moving in space or an electrical conductor.

问题 2：求距离载有 3.00 A 电流的导线 0.10 m 处的磁场大小？另外，电流在页面（或屏幕）之外有一个矢量方向，那么磁场的方向是什么？

解决方案：

By using the formula we calculate the magnetic field:

B = μ02πr

B = (4π×10−7T⋅m/A)(3.00A)2π(0.10m)

B = (4π×10−7T⋅m/A)(3.00A)2π(0.10m)

B = (4π×10−7)(3.00)2π(0.10)

B = (4π×10−7)(3.00)2π(0.10)T

B = 4π(3.00)2π(0.10)×10−7 T

B = 2(30.0)×10−7 T

B = 60.0 ×10−7 T

B= 60.0 ×101−7 T

B = 60.0 ×10−6 T

B = 6.00 μT

电场

带电粒子周围的力称为电场或电场强度。换句话说，它是电场周围存在力线的区域。它有大小和方向。因此，它是一个向量。符号 E 表示电场，单位为牛顿/库仑。

Formula of Electric field = Force/Charge 

$E = F/q$

问题 1：你对电场这个词的理解是什么？

回答：

The force around the electrical charge particle is called an electrical field or electric field intensity. In other words, it is an area around the electric field where the force line exists. It has magnitude and direction. Hence it is a vector quantity. The symbol E expresses the electric field, and it is measured in newton/coulomb.

问题 2： 2 N 的力在任一点作用于电荷 6 μ C。确定该点的电场强度。

解决方案：

Given Force F = 2 N

Charge q = 6 μ C

Electric field formula is given by

E = F / q

= 2/6 × 10^-6

电场和磁场的区别

S. No.	Electric Field	Magnetic Field
1.	It is the force around the electrical charge particle	The region around the magnetic where poles exhibit a force of attraction or repulsion.
2.	The S.I unit is Volt/meter or Newton/coulomb	The S.I unit is Tesla, (Newton × Second) /(Coulomb × Meter)
3.	Symbol used to denote, “E”	Symbol used to denote, B
4.	It is measured by Electrometer.	It is measured by Magnetometer.
5.	It is perpendicular to the magnetic field.	It is perpendicular to the electric field.
6.	Induces on a positive charge and terminate on a negative charge	Generate at the North Pole and terminate at the South Pole.
7.	Electric field lines do not form a closed loop.	The magnetic line forms a closed loop.
8.	Negative or positive charge.	North or South Pole.
9.	Repulsion force on like charges and attraction force on unlike charges.	Repulsion force on like poles and attraction force on unlike poles.
10	Exist in two dimensions	Remain in three dimensions
11	Field can do work (the speed and direction of particles changes)	Magnetic field cannot do work (speed of particles remain constant)