MCQ
According to Wien's displace law :
- ✓$\lambda_{ m } \propto T ^{-1}$
- B$\lambda_{ m } \propto T ^{-2}$
- C$\lambda_{ m } \propto T ^4$
- D$\lambda_{ m } \propto T ^{-4}$
✓
Answer
Correct option: A.
$\lambda_{ m } \propto T ^{-1}$
A
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 $x-t$ graph of a particle moving along a straight line is shown in figure The speed-time graph of the particle is correctly shown by
→A soap bubble in vacuum has a radius of $3 \,cm$ and another soap bubble in vacuum has a radius of $4 \,cm$. If the two bubbles coalesce under isothermal condition, then the radius of the new bubble is ....... $cm$
→Consider a planet moving in an elliptical orbit round the sun. The work done on the planet by the gravitational force of the sun:
- Is zero in any small part of the orbit.
- Is zero in some parts of the orbit.
- Is zero in one complete revolution.
- Is zero in no part of the motion.
Motion of an oscillating liquid column in a U-tube is:
- Periodic but not simple harmonic.
- Non-periodic.
- Simple harmonic and time period is independent of the density of the liquid.
- Simple harmonic and time-period is directly proportional to the density of the liquid.
The area of a rectangular field (in $m ^{2}$) of length $55.3\,m$ and breadth $25 \;m$ after rounding off the value for correct significant digits is
→A particle is moving on a circular path of radius $r$ with uniform speed $v$. What is the displacement of the particle after it has described an angle of $60^o$ ?
→Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
→Assertion $(A)$: Clothes containing oil or grease stains cannot be cleaned by water wash.
Reason $(R)$: Because the angle of contact between the oil/ grease and water is obtuse. In the light of the above statements, choose the correct answer from the option given below.
$Assertion :$ For Reynold’s number $Re > 2000$, the flow of fluid is turbulent.
$Reason :$ Inertial forces are dominant compared to the viscous forces at such high Reynold’s numbers.
→$Reason :$ Inertial forces are dominant compared to the viscous forces at such high Reynold’s numbers.
If the length of the second's hand in a stop clock is $3 \,cm$ the angular velocity and linear velocity of the tip is
→Figure here shows the vertical cross section of a vessel filled with a liquid of density $\rho$. The normal thrust per unit area on the walls of the vessel at the point $P$, as shown, will be
→