Dark plastic handlers often used on kitchen utensils because:
Correct answer: B. The plastic is good insulator.
- A. The black material is good in radiation.
- B. The plastic is good insulator.
- C. The plastic is a good conductor.
- D. The plastic soften gradually with excessive heat.
Explanation
Cooking pots are provided with wooden or plastic handles because they are bad conductors of heat. This prevents the heat from the pan to transfer to our hands.
This question appeared on the HEC Phase I 2017 paper, which you can sit online with every answer explained.
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About Electrical Properties of Solids
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
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