Physics-
General
Easy
Question
Which of the plots shown in the figure represents speed(vn) of the electron in a hydrogen atom as a function of theprincipalquantumnumber(n)?
- B
- D
- C
- A
The correct answer is: B
Related Questions to study
Maths-
lf the Rolle’s theorem holds for the function 
in the interval [−1, 1] for the point 
, then the value of 2a+b is
lf the Rolle’s theorem holds for the function in the interval [−1, 1] for the point , then the value of 2a+b is
Maths-General
Physics-
If
is the frequency of the series limit of Lymanseries, 
is the frequency of the firstline of Lymanseries and
u3 is the frequency of the series limit of the Balmer seriesthen
Ifis the frequency of the series limit of Lymanseries, is the frequency of the firstline of Lymanseries and
u3 is the frequency of the series limit of the Balmer seriesthen
Physics-General
Physics-
The diagram shows the energy levels for an electron in acertainatom. Which transitionshown represents theemissionofaphotonwiththemostenergy?
The diagram shows the energy levels for an electron in acertainatom. Which transitionshown represents theemissionofaphotonwiththemostenergy?
Physics-General
Physics-
Thestopping potential
, versus frequency(v) plotofasubstance is
shown in figure, the threshold wavelengthis
Thestopping potential, versus frequency(v) plotofasubstance is
shown in figure, the threshold wavelengthis
Physics-General
Physics-
Thefigureshowsaplotofphotocurrentversusanodepotentialforaphotosensitivesurfaceforthreedifferent radiations.Whichoneofthefollowingisacorrectstatement?
Thefigureshowsaplotofphotocurrentversusanodepotentialforaphotosensitivesurfaceforthreedifferent radiations.Whichoneofthefollowingisacorrectstatement?
Physics-General
Physics-
Lightofwavelength500nmisincidentonametalwithwork function2.28 eV. The de Broglie wavelengthof the emittedelectronis:
Lightofwavelength500nmisincidentonametalwithwork function2.28 eV. The de Broglie wavelengthof the emittedelectronis:
Physics-General
Physics-
In an experiment on photoelectric effect, a student plotsstoppingpotentialVO against reciprocalof the wavelength
oftheincidentlightfortwodifferentmetalsAandB.Theseareshown inthefigure.
Looking atthegraphs,youcanmostappropriatelysaythat
In an experiment on photoelectric effect, a student plotsstoppingpotentialVO against reciprocalof the wavelengthoftheincidentlightfortwodifferentmetalsAandB.Theseareshown inthefigure.
Looking atthegraphs,youcanmostappropriatelysaythat
Physics-General
Physics-
Twoinsulatingplatesarebothuniformlychargedinsuchawaythatthepotentialdifferencebetweenthemis 
-
=20V.(i.e.,plate2isatahigherpotential).The plates are separatedby d =0.1mand canbe treatedasinfinitelylarge.Anelectronisreleasedfromrestontheinner surfaceofplate1.Whatisitsspeedwhenithitsplate2?
Twoinsulatingplatesarebothuniformlychargedinsuchawaythatthepotentialdifferencebetweenthemis -=20V.(i.e.,plate2isatahigherpotential).The plates are separatedby d =0.1mand canbe treatedasinfinitelylarge.Anelectronisreleasedfromrestontheinner surfaceofplate1.Whatisitsspeedwhenithitsplate2?
Physics-General
Physics-
Photoelectric effect experiments are performed using three different metal plates 
and 
having work functions 
and 
, respectively. A light beam containing wavelengths of 
and 
with equal intensities illuminates each of the plates. The correct 
graph for the experiment is:
(Take hc 
)
Photoelectric effect experiments are performed using three different metal plates and having work functions and , respectively. A light beam containing wavelengths of and with equal intensities illuminates each of the plates. The correct graph for the experiment is:
(Take hc )
Physics-General
Maths-
Let f be differentiable for all x. if f(1) = -2 and 
for x 
[1,6], then
Let f be differentiable for all x. if f(1) = -2 and for x [1,6], then
Maths-General
Maths-
Given 
such that χ=0 is the only real root of 
if
, then in the interval [−1, 1]
Given such that χ=0 is the only real root of if , then in the interval [−1, 1]
Maths-General
Physics-
A point source is emitting light of wavelength 6000 
isplaced at a very small height h above a flat reflecting surfaceMNasshowninthefigure.
The intensity of the reflectedlight is 36% of the incidentintensity.Interference fringes are observed on a screenplacedparalleltothereflectingsurfaceataverylargedistanceD from it. Theshapeoftheinterferencefringesonthescreenis
A point source is emitting light of wavelength 6000 isplaced at a very small height h above a flat reflecting surfaceMNasshowninthefigure.
The intensity of the reflectedlight is 36% of the incidentintensity.Interference fringes are observed on a screenplacedparalleltothereflectingsurfaceataverylargedistanceD from it. Theshapeoftheinterferencefringesonthescreenis
Physics-General
Physics-
The figure shows the interference pattern obtained in a double-slit experiment using light of wavelength 600nm. 1,2,3,4and5aremarkedonfivefringes
The figure shows the interference pattern obtained in a double-slit experiment using light of wavelength 600nm. 1,2,3,4and5aremarkedonfivefringes
Physics-General
Physics-
Inthefigureshownifaparallelbeam of white light is incidenton the plane of the slits thenthedistance of thenearestwhite spot on the screen fromis d/A. Find the value of A(assumed <<D,'A<<d]
Inthefigureshownifaparallelbeam of white light is incidenton the plane of the slits thenthedistance of thenearestwhite spot on the screen fromis d/A. Find the value of A(assumed <<D,'A<<d]
Physics-General
Physics-
The adjacent figure shows Fraunh offer's diffraction due toa single slit. If first minimum is obtained in the directionshown,thenthepath differencebetweenrays1and3is
The adjacent figure shows Fraunh offer's diffraction due toa single slit. If first minimum is obtained in the directionshown,thenthepath differencebetweenrays1and3is
Physics-General
