Download App

12 . kinetic theory of gases — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics12 . kinetic theory of gases1 Mark
MCQ
The average translational kinetic energy of ${N}_{2}$ gas molecules at $\ldots \ldots \ldots . .{ }^{\circ} {C}$ becomes equal to the ${K} . {E}$. of an electron accelerated from rest through a potential difference of $0.1$ $volt.$

$\left(\right.$ Given $\left.{k}_{{B}}=1.38 \times 10^{-23} \, {J} / {K}\right)$

(Fill the nearest integer).

  • ✓
    $500$
  • B
    $50$
  • C
    $5$
  • D
    $0.5$
✓

Answer

Correct option: A.
$500$
a
Given

Translation K.E. of ${N}_{2}={KE}$. of electron

$\frac{3}{2} {kT}={eV}$

$\frac{3}{2} \times 1.38 \times 10^{-23} {T}=1.6 \times 10^{-19} \times 0.1$

$\Rightarrow {T}=773 {k}$

${T}=773-273=500^{\circ} {C}$

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 12 . kinetic theory of gases→12 . kinetic theory of gases — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The plank in the figure moves a distance $100\ mm$ to the right while the centre of mass of the sphere of radius $150\, mm$ moves a distance $75\,mm$ to the left. The angular displacement of the sphere (in radian) is (there is no slipping anywhere) :-
→
An observer moves towards a stationary source of sound with a velocity one-fifth of the velocity of sound. The precentage change in the apparent frequency is ..... $\%$
→
An inelastic ball is dropped from a height of $100\, m$. Due to earth$20\%$ of its energy is lost. To what height the ball will rise ......... $m$
→
A water fountain on the ground sprinkles water all around it. If the speed of water coming out of the fountain is $v$, the total area around the fountain that gets wet is :
→
The $P-V$ diagram of a certain process (carnot cycle) is as shown. The process is also represent as
→
Figure shows a siphon. The liquid shown is water. The pressure difference $P_a P_A$ between the points $A$ and $B$ is the reading will be:
→
Recently, the phenomenon of superconductivity has been observed at $95\, K$. This temperature is nearly equal to ......... $^oF$
→
A particle is projected at $60^o $ to the horizontal with a kinetic energy $K$. The kinetic energy at the highest point is
→
Velocity of center of mass in the absence of external force
→
Equal weight is applied on two wires of the same material whose lengths are L and 2L and radii 2R and R respectively. The increase in length of wires is $l_1$ and $l_2$ respectively, then $l_1: l_2$ will be :
→