本题目来源于试卷: Electric Charge and Electric Field，类别为 IB物理学
[问答题]
Assume that the two opp pij1; w.tl68 rusdr,hegm z,*4ak o5vosite charges in Fig. 1 cibq bj*; ,5 e3upno(z6–31a are 12.0 cm apart. Consider the magnitude of the electric field 2.5 cm from the positive charge. On which side of this charge — top, bottom, left, i *bz 5j;bpcnoe uq(,3or right — is the electric field the strongest? The weakest? Explain.
参考答案: The electric field is strongest to
the right of the positive charge, because the individual fields from the
positive charge and negative charge both are in the same direction (to the
right) at that point, so they add to make a stronger field. The electric field is weakest to the left of
the positive charge, because the individual fields from the positive charge and
negative charge are in opposite directions at that point, and so they partially
cancel each other. Another indication is
the spacing of the field lines. The
field lines are closer to each other to the right of the positive charge, and
further apart to the left of the positive charge.
本题详细解析:
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