AP EAPCET 2024 - 21th May Evening Shift | Elasticity Question 2 | Physics

A 4 kg stone attached at the end of a steel wire is being whirled at a constant speed $12 \mathrm{~ms}^{-1}$ in a horizontal circle. The wire is 4 m long with a diameter 2.0 mm and Young's modulus of the steel is $2 \times 10^{11} \mathrm{Nm}^{-2}$. The strain in the wire is.

$2.4 \times 10^{-4}$

$2.3 \times 10^{-5}$

$4.6 \times 10^{-4}$

$6.9 \times 10^{-4}$

AP EAPCET 2024 - 21th May Morning Shift

MCQ (Single Correct Answer)

-0

The elastic energy stored per unit volume in terms of longitudinal strain $\varepsilon$ and Young's modulus $Y$ is

$\frac{\gamma \varepsilon^2}{2}$

$\frac{1}{2} Y_{\varepsilon}$

$2 \gamma \varepsilon^2$

$2 Y_{\varepsilon}$

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

When the load applied to a wire is increased from 5 kg wt to 8 kg wt . The elongation of the wire increases from 1 mm to 1.8 mm . The work done during the elongation of the wire is (acceleration due to gravity $=10 \mathrm{~ms}^{-2}$ )

$47 \times 10^{-3} \mathrm{~J}$

$72 \times 10^{-3} \mathrm{j}$

$25 \times 10^{-3} \mathrm{~J}$

$97 \times 10^{-3} \mathrm{~J}$

AP EAPCET 2024 - 19th May Evening Shift

MCQ (Single Correct Answer)

-0

If the work done in stretching a wire by 1 min is 2 J . The work necessary for stretching another wire of satrs material but with double radius of cross-section and half the length by 1 mm is

16 J

8 J

4 J

$\frac{1}{4} J$

PREVIOUS NEXT

AP EAPCET Subjects