Tag: transfer of heat

Quizzes (8) Questions (172)

Questions Related to transfer of heat

Multiple choice physics temperature and heat heat and heat transfer transfer of heat fundamentals of heat transfer

Substances which do not allow heat to easily pass through them are known as

  1. Conductors

  2. Insulators

  3. Semi Conductors

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Substances which don't allow heat to easily pass through them are known as insulators. Insulators have crystal structure of molecules, molecules are far from each other, compared to conductors. Hence they cannot pass the heat easily through them, besides this insulators don't have free electrons to pass heat more quickly.

Multiple choice physics temperature and heat heat and heat transfer transfer of heat fundamentals of heat transfer

If needle is burnt then the heat transfer through the whole length of needle is faster because:

  1. needle is a bad conductor of heat

  2. needle is a good conductor of heat

  3. needle is an insulator

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If needle is burnt then the heat transfer through the whole length of needle is faster, because needle (metal), being a good conductor of heat, heat passes along the whole length by conduction, in which heat is transferred by one atom to another connected atom quickly.