Exam-style question
Try this first
What does the density of field lines in a field-line diagram indicate?.
- A.The direction of the field
- B.The strength of the field
- C.The type of field
- D.The area of influence
Model answer
What a good answer should say
- The strength of the field
Explanation
Why this works
The density of field lines in a diagram provides evidence of the field strength; closer lines indicate a stronger field. This interpretation implies that areas with more densely packed lines will exert greater forces on charges or masses placed within them.
Thus, the conclusion is that field-line density is directly related to the strength of the field.
Common mistake
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