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ICSE Class 7 Physics Question 6 of 50

Heat — Question 10

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10
Question

Question 4g

The vacuum kept in between the walls of a thermos flask reduces the heat transfer by:

  1. conduction only
  2. convection only
  3. radiation only
  4. conduction and convection
Answer

conduction and convection

Reason — The vacuum kept in between the walls of a thermos flask reduces the heat transfer by conduction and convection.