Question
A 100 ~m long wire having cross-sectional area 6.25 10^ -4 ~m ^2 and Young's modulus is 10^ 10 Nm ^ -2 is subjected to a load of 250 ~N , then the elongation in the wire will be :
BITSAT
Physics
Mechanical Properties of Solids
2023
BITSAT 2023 (Memory Based Paper 1)
BITSAT Physics Question (2023) — Solution
Options
- A. 6.25 10^ -3 ~m
- B. 4 10^ -4 ~m
- C. 6.25 10^ -6 ~m
- D. 4 10^ -3 ~m
Answer
D. 4 10^ -3 ~m
Step-by-step solution
= F Y A = 250 100 10^ 10 6.25 10^ -4 =40 10^ -4 ~m =4 10^ -3 ~m
Related: Physics — Mechanical Properties of Solids · All PYQ Banks