Question

Two wire A and B have equal lengths and are made of the same material, but the diameter of A is twice that of wire :

• A. Youngs modulus of A is twice that of B
• B. Youngs modulus is the same for both A and B
• C. A can withstand a greater load before breaking than B
• D. A and B will withstand the same load before breaking

Answer 1

Answer: (B), (C)

The correct options are
B Youngs modulus is the same for both A and B
C A can withstand a greater load before breaking than B

Since, wires A and B are made of the same material they have the same Youngs modulus. Now, (breaking load = breaking stress* cross sectional area).The wire having the greater area of cross section can with stand the greater load. Hence, the correct options are (b) and (c).