On stretching a wire, the elastic energy stored per unit volume i… - Vidyadip

MCQ

On stretching a wire, the elastic energy stored per unit volume is

✓
$F l / 2 A L$
B
$F A / 2 L$
C
$F L / 2 A$
D
$F L / 2$

✓

Answer

Correct option: A.

$F l / 2 A L$

(a) Energy stored per unit volume $=\frac{1}{2}\left(\frac{F}{A}\right)\left(\frac{l}{L}\right)=\frac{F l}{2 A L}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ" from Elasticity→Elasticity — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

If the angular momentum of an electron is $\vec J$ then the magnitude of the magnetic moment will be

An electron is moving with constant velocity along $x$-axis. If a uniform electric field is applied along $y$-axis, then its path in the $x-y$ plane will be

If an observer is moving with respect to a stationary electron, then he observes

One mole of an ideal gas at an initial temperature of $T K$ does $6 R$ joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is $5 / 3$, the final temperature of gas will be

A person aiming to reach the exactly opposite point on the bank of a stream is swimming with a speed of $0.5 m / s$ at an angle of 120 with the direction of flow of water. The speed of water in the stream is

In a step up transformer, if ratio of turns of primary to secondary is $1: 10$ and primary voltage is $230 \mathrm{~V}$. If the load current is $2 A$, then the current in primary is

If water rises in a capillary tube upto $3 \mathrm{~cm}$. What is the diameter of capillary tube (Surface tension of water $=7.2 \times 10^{-2}\ \mathrm{N} / \mathrm{m}$ )

A battery of e.m.f. $10 \quad V$ and internal resistance $0.5 ohm$ is connected across a variable resistance $R$. The value of $R$ for which the power delivered in it is maximum is given by

When a force is applied on a wire of uniform cross-sectional area $3 \times 10^{-6} m ^2$ and length $4 m$, the increase in length is $1 mm$. Energy stored in it will be $\left(Y=2 \times 10^{11} N / m ^2\right)$

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current, if it dissipates $22.5 W$, the resistance of fuse wire will be