Assertion A The cooling of the car engine is produced by the car radiator Reason R The radiator...........

General Science (Easy) Physics

Download Solution PDF

Assertion (A) : The cooling of the car engine is produced by the car radiator.

Reason (R) : The radiator loses heat to the surrounding air by radiation.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not a correct explanation of A

A is true but R is false

A is false but R is true

छोटे Courses बड़े Results

Master Physics

Prepare through Micro-courses

Try Now

Explanation:

A is true but R is false

Thermos flask is the device in which heat loss due to conduction, convection and radiation is minimized.

The silver coating on the inner bottle prevents heat transfer by radiation, and the vacuum between its double wall prevents heat moving by convection. The thinness of glass walls stops heat transfer by conduction. The case surrounding the flask provides additional insulation.