A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ?

• A. 2×108 Nm-2
• B. 5×106 Nm-2
• C. 0.5×10-6 Nm-2
• D. 0.2×10-6Nm-2