The Young's modulus of a steel wire of length 6 m and cross-sectional area 3 mm 2 is 2 x 11 11 N/m 2 . The wire is suspended from its support on a given planet, A block of mass 4 kg is attached to the free end of the wire. The acceleration due to gravity on the planet is 
of its value on the earth. The elongation of wire is (Take g on the earth = 10 m/s 2 ):
Text Solution
Verified by ExpertsThe correct answer is:
C
Tension (F) = mg
= 4x 
=10N
= 10 -4 m = 0.1mm
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