MCQ
The dimensional formula for thermal resistance is
- ✓$M^{-1} L^{-2} T^3 \theta$
- B$M^{-1}L^{-2}T^{-3} \theta$
- C$ML^{2} T^{-2} \theta$
- D$ML^{2} T^2 \theta^{-1}$
✓
Answer
Correct option: A.
$M^{-1} L^{-2} T^3 \theta$
a
$\frac{{{\text{dH}}}}{{{\text{dt}}}} = \frac{{{T_1} - {T_2}}}{R}\,\,\,\,\,\,\,\frac{{M{L^2}{T^{ - 2}}}}{T} = \frac{\theta }{R}$
$\frac{{{\text{dH}}}}{{{\text{dt}}}} = \frac{{{T_1} - {T_2}}}{R}\,\,\,\,\,\,\,\frac{{M{L^2}{T^{ - 2}}}}{T} = \frac{\theta }{R}$
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 axis of rotation of a purely rotating body:
- Must pass through the centre of mass.
- May pass through the centre of mass.
- Must pass through a particle of the body.
- May pass through a particle of the body.
A bob of mass $10$ $M$ is suspended through an inextensible string of length $l$. When the bob is at rest at the equilibrium position, two particles of mass $m$ each moving with velocity $u$ making an angle $60^o $ with the string strike and get simultaneously attached to the bob. What is the value of impulsive tension $(l)$ in the string during the impact ?
→There are two identical chambers, completely thermally insulated from surroundings. Both chambers have a partition wall dividing the chambers in two compartments. Compartment $1$ is filled with an ideal gas and Compartment $3$ is filled with a real gas. Compartments $2$ and $4$ are vacuum . A small hole (orifice) is made in the partition walls and the gases are allowed to expand in vacuum
→Statement $-1$ : No change in the temperature of the gas takes place when ideal gas expands in vacuum. However, the temperature of real gas goes down (cooling) when it expands in vacuum
Statement $-2$ : The internal energy of an ideal gas is only kinetic. The internal energy of a real gas is kinetic as well as potential
The mean length of an object is $5\ cm.$ Which of the following measurements is most accurate?
→A hydrogen atom in ground state absorbs $10.2 eV$ of energy. The orbital angular momentum of the electron is increased by:
→In a rocket of mass $1000\, kg$ fuel is consumed at a rate of $40 \,kg/s$. The velocity of the gases ejected from the rocket is $5 \times {10^4}\,m/s$. The thrust on the rocket is
→Out of the given four waves $(1), (2), (3)$ and $(4)$
→$y = a\sin (kx + \omega t)$ ......$(1)$
$y = a\sin (\omega t - kx)$ ......$(2)$
$y = a\cos (kx + \omega t)$ ......$(3)$
$y = a\cos (\omega t - kx)$ ......$(4)$
emitted by four different sources ${S_1},\,{S_2},\,{S_3}$ and ${S_4}$ respectively, interference phenomena would be observed in space under appropriate conditions when
A cylinder fitted with a piston contains $0.2 \,moles$ of air at temperature $27°C.$ The piston is pushed so slowly that the air within the cylinder remains in thermal equilibrium with the surroundings. Find the approximate work done by the system if the final volume is twice the initial volume ...... $J$
→A device used for investigating the vibration of a fixed string or wire is
A person standing on a rotating platform has his hands lowered. He suddenly outstretch his arms. The angular momentum