Question
Physics Question on Waves
Bells are made of metal and not of wood because
A
the thermal conductivity of metal is greater than that of wood
B
the density of the metal is greater than that of wood
C
the sound is not conducted by metals but is radiated.
D
wood dampens vibrations while metals are elastic
Answer
wood dampens vibrations while metals are elastic
Explanation
Solution
Bells are technically supposed to be made of materials that can sustain the vibrations for long and therefore make the sound travel through large distances. This task can be carried out by metals. Wood, on the other hand dampens out the vibrations and therefore, it cannot make the sound sustain for a long time. Hence, it acts as an insulator for sound and therefore it is not used for making bells