JEE Main 2026 Physics question

The diameter of a wire measured by a screw gauge of least count 0.001 cm is 0.08 cm. The length measured by a scale of least count 0.1 cm is 150 cm. When a weight of 100 N is applied to the wire, the extension in length is 0.5 cm, measured by a micrometer of least count 0.001 cm. The error in the measured Young's modulus is α × 10⁹ N/m². The value of α is . (Ignore the contribution of the load to Young's modulus error calculation)

• (A)1.3
• (B)1.65Correct
• (C)0.13
• (D)0.25