Download App

Specific Heat Capacities of Gases — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsSpecific Heat Capacities of Gases1 Mark
MCQ
Two samples $A$ and $B$ are initially kept in the same state. Sample $A$ is expanded through an adiabatic process and the sample $B$ through an isothermal process. The final volumes of the samples are the same. The final pressures in $A$ and $B$ are $p_A$ and $p_B$ respectively.
  • A
    $\mathrm{p}_{\mathrm{A}} > \mathrm{p}_{\mathrm{B}}$
  • B
    $p_A=p_B$
  • ✓
    $p_A < p_B$
  • D
    The relation between $p_A$ and $p_B$ cannot be deduced.
✓

Answer

Correct option: C.
$p_A < p_B$

Let the initial states of samples $A$ and $B$ be i and the final states of samples $B$ and $A$ be $f$ and $f^{\prime}$, respectively.
Let the final volumes of both be $V_0$. As sample $A$ is expanded through an adiabatic process, its curve in the $p-V$ diagram is steeper than that of sample $B ,$ which is expanded through an isothermal process.
Therefore, from the $\mathrm{p}-\mathrm{V}$ diagram, $\mathrm{p}_{\mathrm{A}}\ <\  \mathrm{p}_{\mathrm{B}}$.

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

Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

The angle of incidence for an equilateral prism is $45^o$, what should be the refractive index of prism material so that the ray is parallel to the base inside the prism
→
How much electric flux will come out through a surface $S = 10\hat j$ kept in an electrostatic field $\vec E = 2\hat i + 4\hat j + 7\hat k$.........$units$
→
When the current through the electromagnet of a relay reaches a particular value
→
If a source is transmitting electromagnetic wave of frequency $8.2 \times {10^6}Hz$, then wavelength of the electromagnetic waves transmitted from the source will be.....$m$
→
The energy of a photon of light with wavelength $5000\,\mathop A\limits^o $ is approximately $2.5\, eV$. This way the energy of an $X-$ ray photon with wavelength $1\,\mathop A\limits^o $ would be
→
If a proton enters perpendicularly a magnetic field with velocity $v$, then time period of revolution is $T$. If proton enters with velocity $2 v$, then time period will be
→
Conside ranequi- convex lens of glass $\left( {\mu  = \frac{3}{2}} \right)$ If temperature of lens is increased by $40\, ^oC$ then its focal length remains same. The coefficient of linear expansion of glass is $2.5 \times 1 0^{-4} / \,^oC$ . Calculate change in refractive index of glass on increasing temperature by $40\,^o C$.
→
A parallel plate capacitor of capacitance $5\,\mu F$ and plate separation $6\, cm$ is connected to a $1\, V$ battery and charged. A dielectric of dielectric constant $4$ and thickness $4\, cm$ is introduced between the plates of the capacitor. The additional charge that flows into the capacitor from the battery is........$\mu C$
→
A person wear normal spectacles in which the distance of glasses and eyes is approximately $2\, cm ,$ then power required is $-5 \,D$. If he wears contact lens, then the required power is ......... $D$
→
Two galvanometers $A$ and $B$ require $3\,mA$ and $5\,mA$ respectively to produce the same deflection of $10$ divisions. Then
→