Question

Nishigandha kept a vessel containing all
the ingredients for making tea in a solar
cooker. Shivani kept a similar vessel on a
stove. Whose tea will be ready first and
why?
​

Answer 1

Shivani tea will be ready first because it doesn't take so much time because heat is generated through cylinder or stove and nishigandha tea take long because it can take more heat in the compensation of stove.

Answer 2

Answer:

Shivani's tea will be prepared first.

In Shivani's case, the intensity of the flame in contact with the vessel is very high due to which the flow of heat will be faster. Thus, the time taken by the tea to reach its boiling point will be less. Hence, tea will be prepared fast.

In case of Nishigandha, the intensity of radiation reaching the vessel is not as high as compared to stove's flame. Thus, the flow of heat will be slower in this case due to which more time will be taken to reach the boiling temperature of the tea. Hence, tea will be prepared at slower rate.