Answer:
(B) 1.41 x 10^{10} N/m^{2}
Step-by-step explanation:
diameter of wire (d) = 0.6 mm = 0.0006 m
radius of wire (r) = 0.0006/2 = 0.0003 m
tension (force F) = 20 N
percentage strain = 0.5 %
what is the Young's modulus?
Young's modulus =
where
stress =

stress =

stress =70735530.3 N/m^{2}
- strain = percentage strain ÷ 100
strain = 0.5 ÷ 100 = 0.005
therefore Young's modulus =
=
= 1.41 x 10^{10} N/m^{2}