Question

How much force is required to produce an increase of 0.2% in the length of a brass wire of diameter 0.6 mm

(Young’s modulus for brass = $0.9 \times 10 ^ { 11 } \mathrm {~N} / \mathrm { m } ^ { 2 }$)

• A. Nearly 17 N
• B. Nearly 34 N
• C. Nearly 51 N
• D. Nearly 68 N

Answer 1

Answer: (C)

Nearly 51 N

Answer 2

$F = \frac { Y A l } { L }$