What is a line of force in a field?

Study for the MTA Electrical Test. Use our flashcards and multiple choice questions to prepare, each question includes hints and explanations. Achieve success on your exam!

Multiple Choice

What is a line of force in a field?

Explanation:
A line of force is a curve drawn through a field that shows the direction of the field at every point along it. It represents how a positive test charge would move if placed in the field—the tangent to the line at any point points in the direction of the force there. This is why it’s also called a flux line: the density of lines indicates field strength, with closer lines meaning a stronger field. It’s not a single field vector at one point, and it’s different from a potential line, which marks points of equal electric potential.

A line of force is a curve drawn through a field that shows the direction of the field at every point along it. It represents how a positive test charge would move if placed in the field—the tangent to the line at any point points in the direction of the force there. This is why it’s also called a flux line: the density of lines indicates field strength, with closer lines meaning a stronger field. It’s not a single field vector at one point, and it’s different from a potential line, which marks points of equal electric potential.

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