Why does the hair on our arms get raised when it is brought near a television screen?
Correct answer: B. The electrostatically charged television screen induces a charge on our hair and attracts it.
- A. The magnet of the television screen attracts the magnetic hair
- B. The electrostatically charged television screen induces a charge on our hair and attracts it.
- C. The television screens have a glue which makes our hair stick to them
- D. We get goosebumps from standing that close to a screen as part of a reflex action
Explanation
Following use, TV screens attain an electrostatic charge which induces a charge on our hair and attracts it. The same phenomenon is responsible for dust sticking to television screens following use.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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