MCQ
Maximum speed of sound is:
- AIn water
- ✓In iron
- CIn air
- DIn vacuum
✓
Answer
Correct option: B.
In iron
(B)
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
The temperature gradient in a rod of $0.5 m$ long is ${80^o}C/m$. If the temperature of hotter end of the rod is ${30^o}C$, then the temperature of the cooler end is ...... $^oC$
→If flux of the electric field through a closed surface is zero:
- The electric field must be zero everywhere on the surface.
- The electric field may be zero everywhere in the surface.
- The charge inside the surface must be zero.
- The charge in the vicinity of the surface must be zero.
Some physical quantities are given in Column $I$ and some possible $SI$ units in which these quantities may be expressed are given in Column $II$. Match the physical quantities in Column $I$ with the units in Column $II$ and indicate your answer by darkening appropriate bubbles in the $4 \times 4$ matrix given in the $ORS$.
→| Column $I$ | Column $II$ |
|
$(A)$ $\mathrm{GM}_e \mathrm{M}_5$ $\mathrm{G} \rightarrow$ universal gravitational constant, $\mathrm{M}_{\mathrm{e}} \rightarrow$ mass of the earth, $\mathrm{M}_5 \rightarrow$ mass of the Sun |
$(p)$ (volt) (coulomb) (metre) |
|
$(B)$ $\frac{3 \mathrm{RT}}{\mathrm{M}} ; \mathrm{R} \rightarrow$ universal gas constant, $\mathrm{T} \rightarrow$ absolute temperature, $\mathrm{M} \rightarrow$ molar mass |
$(q)$ (kilogram) $(\text { metre) })^3$ (second) $)^{-2}$ |
| $(C)$ $\frac{F^2}{q^2 B^2}$ ;$\quad F \rightarrow$ force, $q \rightarrow$ charge, $B \rightarrow$ magnetic field | $(r)$ $(\text { meter })^2$ (second) $)^{-2}$ |
|
$(D)$ $\frac{\mathrm{GM}_e}{\mathrm{R}_{\mathrm{e}}}, G \rightarrow$ universal gravitational constant, $\mathrm{M}_{\mathrm{e}} \rightarrow$ mass of the earth, $\mathrm{R}_{\mathrm{e}} \rightarrow$ radius of the earth |
$(s)$ (farad) $(\text { volt) })^2(\mathrm{~kg})^{-1}$ |
The Bulk Modulus for an incompressible liquid is
A uniform metal rod is used as a bar pendulum. If the room temperature rises by $10°C$, and the coefficient of linear expansion of the metal of the rod is $2 \times 10^{-6}$ per $°C,$ the period of the pendulum will have percentage increase of
→A ring of a thin wire of cross-sectional area a and length $l$ is dipped into a liquid of surface tension $\sigma$ and taken out so that a film of liquid is formed in the ring. If young's modulus of material of wire is $Y$ then longitudinal strain developed in the ring will. be
→The adjoining diagram shows three soap bubbles $A, B$ and $C$ prepared by blowing the capillary tube fitted with stop cocks, $S_1$, $S_2$ and $S_3$. With stop cock $S$ closed and stop cocks $S_1$, $S_2$ and $S_3$ opened
→The $r.m.s.$ speed of a certain gas is v at $400\,K.$ The temperature at which the $r.m.s.$ speed becomes two times, will be ...... $K$
→The curve between absolute temperature and ${v^2}_{rms}$ is
→A vibrating tuning fork is moving slowly and uniformly in a horizontal circular path of radius $8\,m$. The shortest distance of an observer in same plane from the tuning fork is $9 \,m$. The distance between the tuning fork and observer at the instant when apparent frequency becomes maximum is ......... $m$
→