Question
Work done by restoring force in a string within elastic limit is $-10 \,J$. Maximum amount of heat produced in the string is .......... $J$
✓
Answer
(a)
Within elastic limit there is no loss of energy in deforming because no permanent deformation.
$\therefore$ We can say
Work done by external force $=$ heat produced
Or (-)ve of work done by restoring force $=$ heat produced
$-1 \times-10 \,J =\Delta H$
$10 \,J =\Delta H$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
$PV$ curve for the process whose $VT$ curve is
→When a potential difference $V$ is applied across a wire of resistance $R$, it dissipates energy at a rate $W$. If the wire is cut into two halves and these halves are connected mutually parallel across the same supply, the same supply, the energy dissipation rate will become:
→The variation of density of a cylindrical thick and long rod, is $\rho = {\rho _0}\frac{{{x^2}}}{{{L^2}}}$ , then position of its centre of mass from $x = 0$ end is
→A mass $m$ is suspended by means of two coiled spring which have the same length in unstretched condition as in figure. Their force constant are $k_1$ and $k_2$ respectively. When set into vertical vibrations, the period will be
→The major product $'Y'$ in the following reaction is
→An object with a mass $10\, kg$ moves at a constant velocity of $10 \,m/sec$. A constant force then acts for $4\, second$ on the object and gives it a speed of $2\, m/sec$ in opposite direction, the force acting on the object is ......... $N$
→A projectile is thrown with an initial velocity of $(a \hat{ i }+b \hat{ j }) ms ^{-1}$. If the range of the projectile is twice the maximum height reached by it, then
→Three identical thin rods each of length $l$ and mass $M $ are joined together to form a letter $H.$ What is the moment of inertia of the system about one of the sides of $H$
→Two plane mirrors are placed parallel to each other at a distance $L$ apart.$A$ point object $O$ is placed between them, at a distance $L / 3$ from one mirror. Both mirrors form multiple images. The distance between any two images cannot be
→The figure shows two points source which emit light of wavelength $\lambda$ in phase with each other and are at a distance $d = 5.5 \lambda$ apart along a line which is perpendicular to a large screen at a distance $L$ from the centre of the source. Assume that $d$ is much less than $L$. Which of the following statement is (are) correct?
→