A wire of cross-sectional area 3 ,m m^2 is first stretched betwee… - Vidyadip

Question

A wire of cross-sectional area $3\,m{m^2}$ is first stretched between two fixed points at a temperature of $20°C$. Determine the tension when the temperature falls to $10°C$. Coefficient of linear expansion $\alpha = {10^{ - 5}} { ^\circ}{C^{ - 1}}$ and $Y = 2 \times {10^{11}}\,N/{m^2}$ ........ $N$

✓

Answer

(c) $F = YA\alpha \Delta t$$ = 2 \times {10^{11}} \times 3 \times {10^{ - 6}} \times {10^{ - 5}} \times (20 - 10) = 60\,N$

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

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which is not true about acetophenone

Time period of a particle executing $SHM$ is $8\, sec.$ At $t = 0$ it is at the mean position. The ratio of the distance covered by the particle in the $1^{st}$ second to the $2^{nd}$ second is :

In Young's experiment, the distance between the slits is reduced to half and the distance between the slit and screen is doubled, then the fringe width

Consider following reaction

A body is slipping from an inclined plane of height $h$ and length $l$. If the angle of inclination is $\theta $, the time taken by the body to come from the top to the bottom of this inclined plane is

The period of oscillations of a magnetic needle in a magnetic field is $1.0 \,sec$. If the length of the needle is halved by cutting it, the time period will be.....$sec$

A thin rod of length $L$ and mass $M$ is bent at the middle point $O$ at an angle of ${60^o}$ as shown in figure. The moment of inertia of the rod about an axis passing through $O$ and perpendicular to the plane of the rod will be

The one division of main scale of vernier callipers reads $1\,mm$ and $10$ divisions of Vernier scale is equal to the $9$ divisions on main scale. When the two jaws of the instrument touch each other the $zero$ of the Vernier lies to the right of $zero$ of the main scale and its fourth division coincides with a main scale division. When a spherical bob is tightly placed between the two jaws, the $zero$ of the Vernier scale lies in between $4.1\,cm$ and $4.2\,cm$ and $6^{\text {th }}$ Vernier division coincides with a main scale division. The diameter of the bob will be $.............10^{-2}\,cm$

The reading of ammeter in the circuit is ............ $A$

An assembly of identical spring-mass systems is placed on a smooth horizontal surface as shown. At this instant, the springs are relaxed. The left mass is displaced to the/left and theiright mass is displaced to the right by same distance and released. The resulting collision is elastic. The time period of the oscillations of system is