Which of These Is the Best Explanation of the "Electric

question 46

Multiple Choice

Which of these is the best explanation of the "electric hair" that can occur when some people brush their hair?

• A) Excess electrons flow onto both the brush and the hair, causing the hairs to repel each other and causing the brush to repel the hairs.
• B) Electrons are brushed either from the hair onto the brush, or vice- versa, causing the brush and hair to be charged, so that the hairs then attract each other while the brush repels the hairs.
• C) The atoms of the brush and hair are heated, causing their electrons to move faster, which spreads out the atoms and thus causes the hairs to stand up.
• D) Electrons are brushed either from the hair onto the brush, or vice- versa, causing the brush and hair to be charged, so that the hairs then repel each other while the brush attracts the hairs.
• E) The atoms of the brush and hair are set into rapid vibration, causing them to emit electromagnetic waves, which causes the hairs to stand up.

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