Physics
Two rods A and B of the same metal, but of length 1 m and 2 m respectively, are heated from 0°C to 100°C. Then:
- both the rods A and B elongate the same
- the rod A elongates more than the rod B
- the rod B elongates more than the rod A
- the rod A elongates, but the rod B contracts
Heat Energy
3 Likes
Answer
the rod B elongates more than the rod A
Reason — The increase in length of a solid rod on heating depends on its original length, temperature and material. Longer the rod, greater is the increase in its length. Since temperature and material are same so greater length rod B (2 m) will elongates more than rod A (1 m).
Answered By
2 Likes
Related Questions
During boiling or vaporization:
- all molecules take part
- temperature rises
- no heat is absorbed
- the average kinetic energy of molecules increases
The boiling point of a liquid is increased by:
- increasing the volume of liquid
- increasing the pressure on liquid
- adding ice to the liquid
- decreasing pressure on liquid
Two rods A and B of the same metal, same length, but one solid and other hollow, are heated to the same rise in temperature. Then:
- the solid rod A expands more than the hollow rod B
- the hollow rod B expands more than the solid rod A
- the hollow rod B contracts, but the solid rod A expands
- both the rods A and B expand the same
A given volume of alcohol and the same volume of water are heated from the room temperature to the same temperature then:
- alcohol contracts, but water expands
- water contracts, but alcohol expands
- water expands more than alcohol
- alcohol expands more than water