Question

When a metal rod is heated it expands because: 

Solution

Correct option is

The distance among its atoms increases

With rise in temperature, the amplitude of vibration and hence energy of atoms increases. This results in an increase in the average distance between them and the rod expands. 

SIMILAR QUESTIONS

Q1

Specific heat of a gas undergoing adiabatic change is:

Q2

Which of the following produces more servere burns? 

Q3

A body cools from 91oC to 89oC in 5 minutes when the room temperature is 20oC. Then it will cool from 71oC to 69oC in:   

Q4

Three liquids with masses m1m2m3 are thoroughly mixed. If their specific heats are s1s2s3 and their temperature θ1θ2θ3 respectively, then the temperature of the mixture is:    

Q5

80 gm of water at 30oC is poured on a large block of ice at 0oC. The mass of ice that melts is:

Q6

250 gm of water and equal volume of alcohol of mass 200 gm are replaced successively in the same calorimeter and cool from 60oC to 55oC in 130 seconds and 67 seconds respectively. If the water equivalent of the calorimeter is 10 gm, then the specific heat of alcohol in cal/gm-oC is:   

Q7

The sprinkling of water reduce the temperature of a closed room because: 

Q8

Two bars of copper having same length but unequal diameter are heated to the same temperature. The change in length will be:  

Q9

The beaker is completely filled with water at 4oC. It will overflow:

Q10

Expansion during heating: