At 
, a brass wire of 1 mm radius is hung from the ceiling. A small mass, M is hung from the free end of the wire. When the wire is cooled down from 40ºC to 20ºC it regains its original length of 0.2 m. The value of M is close to:
(Coefficient of linear expansion and Young’s modulus of brass are 
and 
, respectively; g = 10 
)
A
9 kg
B
0.5 kg
C
1.5 kg
D
Text Solution
Verified by ExpertsThe correct answer is:
D
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