Question

A thermos flask minimises the flow of heat due to ?

• A. Convection
• B. Radiation
• C. Conduction
• D. All of these

Answer 1

The correct option is D

All of these

The explanation for the correct option (d)

1. Thermoflask is a jar designed to minimize heat loss.
2. Its construction is in such a way that a vacuum layer prevents heat transfer through conduction and convection as its a vacuum there are no molecules are present.
3. A silver lining prevents heat transfer through radiation. So thermos flask is designed in such a manner to prevent heat loss through conduction, convection, and radiation.

Hence the (d) is the correct option.