Physics-
General
Easy
Question
Thefigureshowsaplotofphotocurrentversusanodepotentialforaphotosensitivesurfaceforthreedifferent radiations.Whichoneofthefollowingisacorrectstatement?
- Curves(1)and(2)representincidentradiationsofsamefrequencybutofdifferentintensities.
- Curves(2)and(3)representincidentradiationsofdifferentfrequenciesanddifferentintensities.
- Curves(2)and(3)representincidentradiationsofsamefrequencyhavingsameintensity.
- Curves (1) and (2)representincident radiations ofdifferentfrequenciesanddifferentintensities.
The correct answer is: Curves(1)and(2)representincidentradiationsofsamefrequencybutofdifferentintensities.
Related Questions to study
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
Physics-
Twocoherentpointsources
and
areseparatedbyasmalldistancedasshown.Thefringesobtainedonthe vertical screenwillbe:
Twocoherentpointsourcesandareseparatedbyasmalldistancedasshown.Thefringesobtainedonthe vertical screenwillbe:
Physics-General
Physics-
Huygen' sconcept of second ary wave
Huygen' sconcept of second ary wave
Physics-General
Physics-
Figureshowstwocoherentsourcesand vibratinginsamephase.ABisanirregularwirelyingatafardistance fromthesources
and 
How many bright spots will be seen on the wire, includingpointsAand B?
Figureshowstwocoherentsourcesand vibratinginsamephase.ABisanirregularwirelyingatafardistance fromthesourcesand How many bright spots will be seen on the wire, includingpointsAand B?
Physics-General
Physics-
In Young's double slit experimentshown in figure and arecoherentsourcesandSisthescreenhavingaholeata point1.0 mmawayfromthecentralline. Whitelight(400to700nm)issentthroughtheslits.Whichwavelengthpassingthroughtheholehasstrongintensity?
In Young's double slit experimentshown in figure and arecoherentsourcesandSisthescreenhavingaholeata point1.0 mmawayfromthecentralline. Whitelight(400to700nm)issentthroughtheslits.Whichwavelengthpassingthroughtheholehasstrongintensity?
Physics-General
Physics-
A beam of light is incident on a glass slab (
= 1.54) in adirectionas shown in the figure. The reflected lightisanalysed by a polaroid prism. On rotating the polaroid, (tan
=1.54)
A beam of light is incident on a glass slab (= 1.54) in adirectionas shown in the figure. The reflected lightisanalysed by a polaroid prism. On rotating the polaroid, (tan=1.54)
Physics-General
