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Force lines refer to some imaginary lines in the force field. The tangent line of any point on these lines points to the direction of the field at that point, and the number of lines passing through the unit area perpendicular to the field represents the strength of the field.
Chinese name
Force line
Foreign name
Lines of force
Definition
It refers to some imaginary lines in the force field
When dealing with electric or magnetic fields, the concept of force lines is perhaps the most commonly used.
power line
These are lines drawn in the space around a charged object to represent or describe the electric field.These lines are very helpful for visualizing and quantifying the electric field.At any pointpower lineThe direction is drawn parallel to the direction of electric field intensity E at the point.It is specified quantitatively that the number of power lines passing through an imaginary unit area surface perpendicular to the field should be equal tofield strengthE。
According to the provisions of this certain amount, and using the rationalized m · kg · s unit system, then frompositive chargeq (Coulomb）The source power line has q/..Bar, but terminates at the same sizenegative chargeThe number of power lines on one q is the same.Here on the second 885XI。One "coulomb 2/Newton meter, isVacuum permittivity。See“electric field”(eleetrie field).
Magnetic line of force
The magnetic field with the strength of magnetic line of force H can also be represented by a line called magnetic line of force.The number of force lines perpendicular to the unit area of H is numerically equal to the value of H.The magnetic force lines generated by the current are some closed curves,Magnetic induction lineThe same is true.frommagnetThe magnetic line of force generated outside the magnet originates from the North Pole and ends at the South Pole.See“magnetic field”。
