MCQ
How is the temperature of stars determined by
  • A
    Stefan's law
  • Wein's displacement law
  • C
    Kirchhoff's law
  • D
    Ohm's law

Answer

Correct option: B.
Wein's displacement law
(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

Similar questions

With a potentiometer null point were obtained at $140 \mathrm{~cm}$ and 180 cm with cells of emf $1.1 \mathrm{~V}$ and one unknown $X$ volts. Unknown emf is
Ratio between total intensity of magnetic field at equator to poles is
The figures represent three cases of a ray passing through a prism of angle $A$. The case corresponding to minimum deviation is
Image
The correct statement from the following is
In a conductor $4$ coulombs of charge flows for $2$ seconds. The value of electric current will be
A microammeter has a resistance of $100 \Omega$ and full scale range of $50 \mu \mathrm{A}$. It can be used as a voltmeter or as a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combination
A coil is wound as a transformer of rectangular cross-section. If all the linear dimensions of the transformer are increased by a factor $2$ and the number of turns per unit length of the coil remain the same, the self inductance increased by a factor of
A ball of mass $m_1$ and another ball of mass $m_2$ are dropped from equal height. If time taken by the balls are $t_1$ and $t_2$ respectively, then
The largest distance between the interatomic planes of a crystal is 10 $\mathrm{cm}$. The upper limit for the wavelength of $X$-rays which can be usefully studied with this crystal is
A wire of length $L$ and 3 identical cells of negligible internal resistances are connected in series. Due to current, the temperature of the wire is raised by $\Delta T$ in a time $t$. A number $N$ of similar cells is now connected in series with a wire of the same material and cross-section but of length $2 L$. The temperature of the wire is raised by the same amount $\Delta T$ in the same time $t$. the value of $N$ is