Advertisements
Advertisements
प्रश्न
Write true or false for a given statement.
Medium is necessary for the transfer of heat by radiation.
विकल्प
True
False
Advertisements
उत्तर
False.
APPEARS IN
संबंधित प्रश्न
Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation.

Stainless steel pans are usually provided with copper bottoms. The reason for this could be that ______.
Fill in the blank
A hot metallic piece is placed in tap water contained in a bucket. Heat will flow from _______ to _________
Fill in the blank
Heat transfer in liquids and gases is by ________.
Select the correct alternative
If we add a lump of ice to a tumbler containing water,
State the direction of heat transfer by way of convection.
Why are heaters fitted near the floor and air conditioners near the ceiling of a room?
The handles of cooking utensils are made of ______.
Wrap a thin paper strip tightly around an iron rod. Try to burn the paper with candle while rotating the iron rod continuously. Does it burn? Explain your observation.
Take two similar transparent glass bottles having wide mouths. Put a few crystals of potassium permanganate or pour a few drops of ink in one bottle. Fill this bottle with hot water. Fill the other bottle with cold water. Cover the cold water bottle with a thick piece of paper such as a postcard. Press the postcard firmly with one hand and hold the bottle with the other hand. Invert the bottle and place it on top of the hot water bottle. Hold both the bottles firmly. Ask some other person to pull the postcard. Observe what happens. Explain.
