Objects A and B that are initially separated from each other and … - Vidyadip

MCQ

Objects $A$ and $B$ that are initially separated from each other and well isolated from their surroundings are then brought into thermal contact. Initially $T_A= 0^oC$ and $T_B = 100^oC$. The specific heat of $A$ is less than the specific heat of $B$. After some time, the system comes to an equilibrium state. The final temperatures are :

✓
$T_A= T_B > 50^°C$
B
$T_A> T_B > 50^°C$
C
$T_A= T_B < 50^°C$
D
$T_B > T_A> 50^°C$

✓

Answer

Correct option: A.

$T_A= T_B > 50^°C$

a
At equlibrium temp. of both objects are same Heat loss $+$ heat gain $= 00$
$M_BC_B (T -100) + M_AC_A (T -0) = 0$

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 "M.C.Q (1 Marks)" from 10.2 , transmission of heat→10.2 , transmission of heat — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

A body of mass $1 \,\, kg$ is acted upon by a force $\vec F = 2\sin 3\pi t\,\hat i + 3\cos 3\pi t\,\hat j$ find its position at $t = 1 \,\, sec$ if at $t = 0$ it is at rest at origin.

A black body at a temperature of ${227^o}C$ radiates heat energy at the rate of $5 cal/cm^2-sec$. At a temperature of ${727^o}C$, the rate of heat radiated per unit area in $cal/cm^2$ will be

A player throws a ball that reaches to the another player in $4\,s$. If the height of each player is $1.5\,m$, the maximum height attained by the ball from the ground level is .......... $m$

The two vectors $\vec A$ and $\vec B$ that are parallel to each other are

If a calculated value $2.7465 \,g$ contains only three significant figures, the two insignificant digits in it are ............

The velocity $u$ and displacement $r$ of a body are related as $u^2 = kr$, where $k$ is a constant. What will be the velocity after $1\, second$ ? (Given that the displacement is zero at $t = 0$)

For a constant hydraulic stress on an object, the fractional change in the object's volume $\left( {\frac{{\Delta V}}{V}} \right)$ and its bulk modulus $(B)$ are related as

The frequency of tuning forks $A$ and $B$ are respectively $3\%$ more and $2\%$ less than the frequency of tuning fork $C.$ When $A$ and $B$ are simultaneously excited, $5$ beats per second are produced. Then the frequency of the tuning fork $'A'$ (in $Hz$) is

Three identical rods, each of length $l$, are joined to form a rigid equilateral triangle. Its radius of gyration about an axis passing through a corner and perpendicular to the plane of the triangle is

The initial velocity of a body moving along a straight line is $7 \,m/s$. It has a uniform acceleration of $4\,m/{s^2}$. The distance covered by the body in the $5^{th}$ second of its motion is..........$m$