Related Questions

The law which states that wave-length of maximum radiation is inversely proportional to the absolute of the emitting body is known as:
A Wien’s Displacement Law
B Ohm's Law
C Ferel's Law
D Ampere's Law
Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature.
A Minimum energy
B Maximum energy
C Both (A) and (B)
D None of these
একটি ধাতব তলে λ তরঙ্গদৈর্ঘ্যের একবর্ণী আলোকরশ্মি আপতিত হলে ফটো-ইলেক্ট্রন নির্গত হয় এবং এক্ষেত্রে বিভবের মান 3Vo একই তলে যখন 2λতরঙ্গদৈর্ঘ্যের একবর্ণী আলো আপতিত হয়, তখন নিবৃত্তি বিভবের মান Vol ফটো-ইলেক্ট্রন নির্গত হওয়ার জন্য ঐ তলটির সূচন তরঙ্গদৈর্ঘ্যের মান নির্ণয় কর।(A monochromatic light of wavelength λ is incident on a metallic surface then ejects photo-electron and the value of stopping potential is 3Vo. When the same surface is illuminated by a light of wavelength 2λ., the stopping potential becomes Vo. Calculate the threshold wavelength for this surface to eject photo electrons.)
A 6λ
B 8λ
C 4λ3
D λ
E 4λ
For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume and T = Absolute temperature)
A $$\frac{{\text{v}}}{{\text{T}}}$$ = constant, if p is kept constant
B pv = constant, if T is kept constant
C $$\frac{{\text{T}}}{{\text{p}}}$$ = constant, if v is kept constant
D $$\frac{{\text{p}}}{{\text{T}}}$$ = constant, if v is kept constant
According to Wien's law, the wavelength corresponding to maximum energy is proportion to
A Absolute temperature (T)
B f
C t
D None of these
The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body)
A α.T
B α.$$\frac{1}{{\text{T}}}$$
C α.T4
D Independent of T
Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to
A T
B J
C J2
D Vr
The absolute entropy for all crystalline substances at absolute zero temperature is
A Zero
B Negative
C More than zero
D Indeterminate
It takes 72 hours for five workers to paint an office building. If the number of hours worked is inversely proportional to the number of workers, how many hours should it take six workers to paint the building?
A 68 hours
B 65 hours
C 60 hours
D 70 hours
Total peripheral resistance is inversely proportional to
A Cross sectional area of blood vessels
B Radius of blood vessels
C Velocity of blood flow
D Viscosity of blood
E Length of blood vessels

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