CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Radiation

A thermos fla...

Question

A thermos flask consists of a double-walled glass vessel with the space between them filled with air, which is a bad conductor of heat. True of flase?

Open in App

Solution

False.
In a thermos flask, the space between the two glass walls is empty. This vacuum prevents heat loss through conduction and convention, as there is no medium present to transfer the heat by these two processes.

Suggest Corrections

thumbs-up

1

Similar questions

Q. Consider the following statements about a thermos flask
1.It is a practical device in which the heat flowing into or out of the system by conduction, convection or radiation is reduced as much as possible.
2.It consists of a double-walled glass vessel.
3.The heat transfer by convection is minimised by silvering the surfaces and the radiation is minimised by evacuating the space between the walls.Of these, the correct ones are

True or false?

(a) Glass is a bad conductor of heat.

(b) In a thermos flask, hot things remain hot and cold things become warm.

(c) Radiation of heat depends upon the colour of the outer surface of the body.

(d) During radiation the particles of the medium vibrate.

Q. Assertion :Two thin blankets put together are warmer than a single blanket of double the thickness. Reason: Air gets trapped between two blanket which is a bad conductor of heat.

Q. Explain Why the space between the two walls in a thermos flask is vacuum?

Q. The gap in between the walls of a thermos flask reduces the heat transfer by:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Radiation_tackle

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard VII Physics

Join BYJU'S Learning Program

CrossIcon