A copper wire (Y = 1 × 1011 N/m2) of length 6 m and a steel wire (Y = 2 × 1011 N/m2) of length 4 m each of cross-section 10-5 m2 are fastened end to end and stretched by a tension of 100 N. The elongation produced in the copper wire is
A. 0.2 mm
B. 0.4 mm
C. 0.6 mm
D. 0.8 mm
Answer:C
A copper wire (Y = 1 × 1011 N/m2) of length 6 m and a steel wire (Y = 2 × 1011 N/m2) of length 4 m each of cross-section 10-5 m2 are fastened end to end and stretched by a tension of 100 N. The elongation produced in the copper wire is
A. 0.2 mm B. 0.4 mm C. 0.6 mm D. 0.8 mm