NEET Physics Young's Modulus MCQ Question
Two wires A and B made of different materials of lengths 6.0 cm and 5.4 cm, respectively and area of cross sections 3.0 × 10⁻⁵ m² and 4.5 × 10⁻⁵ m², respectively are stretched by the same magnitude under a given load. The ratio of the Young's modulus of A to that of B is x : 3. The value of x is _____
2
1
4
5
Correct Answer
Detailed Explanation
Young's modulus is given by the formula Y = (F/A) / (ΔL/L). Since the same load is applied and the extensions are the same, the ratio of Young's moduli is inversely proportional to the product of length and area of cross-section. Calculating gives x = 4.
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