| 11. | When lines of force are perpendicular to the sheet, the flakes are edge-on, and appear significantly darker.
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| 12. | Magnetic lines of force attract ferrous particles.
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| 13. | It looks like the lines of force in the figure at left are hand drawn and not calculated.
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| 14. | Sort of like lines of force.
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| 15. | James Clerk Maxwell drew attention to this fact in his 1861 paper " On Physical Lines of Force ".
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| 16. | One enigma concerns the lines of force of the earth's magnetic field, both today and in the distant past.
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| 17. | Historically, the first time fields were taken seriously was with Faraday's lines of force when describing the electric field.
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| 18. | The bombs released charged particles which behaved exactly as Christofilos had predicted, being trapped along the lines of force.
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| 19. | At zero degrees, the rectangular arm of the armature does not cut any lines of force, giving zero voltage output.
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| 20. | Electro propels himself along magnetic lines of force in objects that have great electrical potential, such as high-tension electrical lines.
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