Properties Of M...

In which mode of transmission do heat waves travel along a straight line with the speed of light?

In the following question, a statement of assertion is given, followed by a corresponding statement of reason just below it. Mark the correct answer as

(a) if both assertion and reason are true, and the reason is the correct explanation of the assertion

(b) if both assertion and reason are true, but the reason is not the correct explanation of the assertion

(c) if assertion is true, but reason is false

(d) if both assertion and reason are false

Assertion: It is hotter over the top of fire than at the same distance on the sides.

Reason: Air surrounding the fire conducts more heat upwards.

If the difference in temperature on the two sides of a wall increases from 100°C to 200°C, its thermal conductivity

In an isochoric process,

A beaker is completely filled with water at 4°C. It will overflow if it is