JEE Main 2024 Physics question
The density and breaking stress of a wire are 6 × 10 kg/m and 1.2 × 10 N/m respectively. The wire is suspended from a rigid support on a planet where acceleration the due to gravity is rd of the value of on the surface of earth. The maximum length of the wire with breaking is ………m (take, g = 10 m/s)
Answer: 600
Solution
Breaking stress = ρℓg′ with g′ = 10/3: ℓ = 1.2 × 10⁸/(6 × 10⁴ × 10/3) = 600 m.