AP EAPCET 2024 - 19th May Evening Shift | Elasticity Question 7 | Physics

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

$\frac{1}{4} J$

AP EAPCET 2024 - 18th May Morning Shift

MCQ (Single Correct Answer)

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Two copper wires $A$ and $B$ of lengths in the ratio $1: 2$ and diameters in the ratio $3: 2$ are stretched by foren in the ratio $3 : 1$. The ratio of the clastic potential energies stored per unit volume in the wires $A$ and $B$ is.

$2: 1$

$4: 9$

$16: 9$

$4: 3$

AP EAPCET 2022 - 5th July Morning Shift

MCQ (Single Correct Answer)

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Two wires $$A$$ and $$B$$ of same cross-section are connected end to end. When same tension is created in both wires, the elongation in $$B$$ wire is twice the elongation in $$A$$ wire. If $$L_A$$ and $$L_B$$ are the initial lengths of the wires $$A$$ and $$B$$ respectively, then (Young's modulus of material of wire $$A=2 \times 10^{11} \mathrm{~Nm}^{-2}$$ and Young's modulus of material of wire $$B=1.1 \times 10^{11} \mathrm{~Nm}^{-2}$$).

$$\frac{L_A}{L_B}=\frac{10}{11}$$

$$\frac{L_A}{L_B}=\frac{4}{5}$$

$$\frac{L_A}{L_B}=\frac{9}{11}$$

$$\frac{L_A}{L_B}=\frac{3}{7}$$

AP EAPCET 2022 - 4th July Morning Shift

MCQ (Single Correct Answer)

-0

Same tension is applied to the following four wires made of same material. The elongation is longest in

wire of length 200 cm and diameter 2 mm

wire of length 300 cm and diameter 3 mm

wire of length 50 cm and diameter 0.5 mm

wire of length 100 cm and diameter 1 mm

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