Question

In steel, the young's modulus and the strain at the breaking point are 2 × 10¹¹ Nm^–2 and 0.15 respectively. The stress at the break point for steel is –

• A. 1.33 × 10¹¹ Nm^–2
• B. 1.33 × 10¹² Nm^–2
• C. 7.5 × 10^–3 Nm^–2
• D. 3 × 10¹⁰ Nm^–2

Answer 1

Answer: (D)

3 × 10¹⁰ Nm^–2

Answer 2

Stress = Y ×strain = 2 × 10¹¹ × 0.15 Nm^–2

= 3 × 10¹⁰ Nm^–2