Advertisements
Advertisements
प्रश्न
A circular metal loop is heated at point O as shown in the following figure.
- In which direction would heat flow in the loop?
- In which order are the pins at points P, Q and R fixed with the help of wax fall if points O, P, Q and R are equidistant from each other?
लघु उत्तर
Advertisements
उत्तर
- The heat will flow in both directions, i.e., from O to P and O to R.
- At first the pins at R and P will fall simultaneously followed by the pin at Q.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Draw a labelled diagram of a thermo flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to a minimum in it.
Define the term heat.
What will absorb heat?
Steel spoon
What will absorb heat?
Water
What will absorb heat?
Wooden board
What will absorb heat?
Soil
A wooden knob and a metal latch on a door are both at room temperatures. Explain, why the latch is colder to touch.
When an object is heated, the molecules that make up the object
Observe the picture given in figure. Water is being boiled in a pan of wide base.
- Which position P or T will feel warmer?
- Fill up the boxes P and T to indicate the mode of flow of heat to the hand.
Match the following:
| Column A | Column B | ||
| 1. | Heat | a. | Heat gained or lost in the change of state without any change in temperature |
| 2. | m × L. | b. | Heat gained or lost when there is no change of state |
| 3. | Temperature | c. | Form of energy |
| 4. | m × s × t | d. | SI unit of specific latent heat |
| 5. | J/Kg | e. | degree of hotness or coldness |
