A copper wire of | ELASTICITY AND VISCOSITY | JEE MAIN_2026

Competishun Header

JEE MAIN_2026

05-04-26_S2

Question

A copper wire of length 3 m is stretched by 3 mm by applying an external force. The volume of the wire is $600 \times 10^{-6} \mathrm{~m}^3$. The elastic potential energy stored in the wire in stretched condition would be $\_\_\_\_$ J. (Given Young modulus of copper $=1.1 \times 10^{11} \mathrm{~N} / \mathrm{m}^2$ )

Write Your Answer

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\begin{aligned} & \mathrm{U}=\frac{1}{2} \times \mathrm{Y} \times(\text { strain })^2 \times \text { volume } \\ & =\frac{1}{2} \times 1.1 \times 10^{11} \times\left(\frac{3 \times 10^{-3}}{3}\right)^2 \times 600 \times 10^{-6} \\ & \mathrm{U}=33 \mathrm{~J}\end{aligned}$

Question Tags

JEE Main

Physics

Easy

Start Preparing for JEE with Competishun

Filters 0

Showing 18 questions

The rain drop of mass 1 g , starts with zero velocity from a height of 1 km . It...

JEE MainPhysicsMedium

View Solution→

The potential energy of a particle changes with distance x from a fixed origin as $V=\frac{A \sqrt{x}}{x+B}$, where A and...

JEE MainPhysicsMedium

View Solution→

The density $\rho$ of a uniform cylinder is determined by measuring its mass $m$, length I and diameter $d$. The...

JEE MainPhysicsMedium

View Solution→

Q JEE Main 20262026

The number of points in the interval [2,4], at which the function $f(x)=\left[x^2-x-\frac{1}{2}\right]$, where [-] denotes the greatest integer function,...

JEE MainMathematicsEasy

View Solution→

Q JEE Main 20262026

If the area of the region bounded by $16 x^2-9 y^2=144$ and $8 x-3 y=24$ is A , then $...

JEE MainMathematicsEasy

View Solution→

QJEE Main 20262026

Let A be the point $(3,0)$ and circles with variable diameter AB touch the circle $x^2+y^2=36$ internally. Let the curve...

JEE MainMathematicsEasy

View Solution→

QJEE Main 20262026

Consider the matrices $\mathrm{A}=\left[\begin{array}{ll}2 & -2 \\ 4 & -2\end{array}\right]$ and $\mathrm{B}=\left[\begin{array}{ll}3 & 9 \\ 1 & 3\end{array}\right]$. If matrices...

JEE MainMathematicsEasy

View Solution→

A circular loop of radius 20 cm and resistance $2 \Omega$ is placed in a time varying magnetic field $...

JEE MainPhysicsEasy

View Solution→

QJee Main 20262026

The number of points, at which the function $f(x)=\max \left\{6 x, 2+3 x^2\right\}+|x-1| \cos \left|x^2-\frac{1}{4}\right|, x \in(-\pi, \pi)$, is not...

JEE MainMathematicsMedium

View Solution→

QJEE Main 20262026

Let $\mathrm{A}=\{2,3,4,5,6\}$. Let R be a relation on the set $\mathrm{A} \times \mathrm{A}$ given by $(x, y) \mathrm{R}(z, w)$ if...

JEE MainMathematicsEasy

View Solution→

When an external resistance of $5 \Omega$ is connected across terminals of a cell, a current of 0.25 A flows...

JEE MainPhysicsEasy

View Solution→

QJee Main 20262026

Let $\overrightarrow{a_k}=\left(\tan \theta_k\right) \hat{i}+\hat{j}$ and $\overrightarrow{b_k}=\hat{i}-\left(\cot \theta_k\right) \hat{j}$, where $\theta_k=\frac{2^{k-1} \pi}{2^n+1}$, for some $n \in \mathbb{N}, n>5$. Then the value...

JEE MainMathematicsHard

View Solution→

A series LCR circuit with R $=20 \Omega, \mathrm{~L}=1.6 \mathrm{H}$ and $\mathrm{C}=40 \mu \mathrm{~F}$ is connected to a variable frequency...

JEE MainPhysicsEasy

View Solution→

Q JEE Main 20262026

Let $x=x(y)$ be the solution of the differential equation $2 y^2 \frac{\mathrm{~d} x}{\mathrm{~d} y}-2 x y+x^2=0, y>1, x(\mathrm{e})=\mathrm{e}$. Then $x\left(\mathrm{e}^2\right)$...

JEE MainMathematicsEasy

View Solution→

QJee Main 20262026

If $\mathrm{A}=\frac{\sin 3^{\circ}}{\cos 9^{\circ}}+\frac{\sin 9^{\circ}}{\cos 27^{\circ}}+\frac{\sin 27^{\circ}}{\cos 81^{\circ}}$ and $\mathrm{B}=\tan 81^{\circ}-\tan 3^{\circ}$, then $\frac{\mathrm{B}}{\mathrm{A}}$ is equal to $\_\_\_\_$ .

JEE MainMathematicsMedium

View Solution→

The heat extracted out of x gram of water initially at $50^{\circ} \mathrm{C}$ to cool it down to $0^{\circ} \mathrm{C}$...

JEE MainPhysicsEasy

View Solution→

Q JEE Main 20262026

Let $f(x)=\int\left(\frac{x^2+2 x-15}{x^2}\right) \mathrm{d} x$. If $f(4)=14 \log _e(3)$ and $f(7)=\log _e\left(2^\alpha-3^\beta\right), \alpha, \beta \in \mathbf{N}$, then $\alpha+\beta$ is equal...

JEE MainMathematicsEasy

View Solution→

A copper wire of length 3 m is stretched by 3 mm by applying an external force. The volume of...

JEE MainPhysicsEasy

View Solution→