Electric Charge and Electric Field (id: 74054ed7c)

本题目来源于试卷: Electric Charge and Electric Field，类别为 IB物理学

[问答题]
Show, using the three rules for field lines gydr:8k 6 d5rg;rx 3 /z*iohajzive42ylt j.rs3v iy(sr,uozl;z: n in Section 16–8, that the electric field lines starting or ending on a single point charge must be symmetricallr4( t;lj2zsr, uiy3y:z.sv ol y spaced around the charge.

参考答案:

From rule 1:   A test charge would be either attracted directly towards or repelled directly away from

a point charge, depending on the sign of the point charge.  So the field lines must be directed either radially towards or radially away from the point charge.

From rule 2:   The magnitude of the field due to the point charge only depends on the distance from the point charge.  Thus the density of the field lines must be the same at any location around the point charge, for a given distance from the point charge.

       From rule 3:  If the point charge is positive, the field lines will originate from the location of the

point charge.  If the point charge is negative, the field lines will end at the location of the point charge.

      Based on rules 1 and 2, the lines are radial and their density is constant for a given distance.  This is equivalent to saying that the lines must be symmetrically spaced around the point charge.

本题详细解析: 暂无

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