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General
Easy
Question
An observer can see through a pinhole the top end of a thin rod ofheight h, placed as shown in thefigure. The beaker height is 3h andits radius h. Whenthe beaker isfilled with a liquid up to a height2h,hecanseethelowerendoftherod.Thentherefractiveindexoftheliquidis
The correct answer is:
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Fora prism keptinair it is found that for an angle of incidence 
,theangleofPrismA,angleofdeviation8andangleof emergence'e' become equal. Then there fractive in dex of the prism is
Fora prism keptinair it is found that for an angle of incidence ,theangleofPrismA,angleofdeviation8andangleof emergence'e' become equal. Then there fractive in dex of the prism is
Physics-General
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Alightrayfallsonarectangularglassslabas shown. The index of refraction of the glass, iftotalinternalreflectionis to occur at theverticalface,is
Alightrayfallsonarectangularglassslabas shown. The index of refraction of the glass, iftotalinternalreflectionis to occur at theverticalface,is
Physics-General
Maths-
Let f: R
R be a function defined by f(x) = Min 
. Then which of the following is true?
Let f: RR be a function defined by f(x) = Min . Then which of the following is true?
Maths-General
Maths-
Let f9x) = x
and g(x) = sinx
Statement 1: gof is differentiable at x = 0 and its derivative is continuous at that point
Statement 2: gof is twice differentiable at x = 0
Let f9x) = x and g(x) = sinx
Statement 1: gof is differentiable at x = 0 and its derivative is continuous at that point
Statement 2: gof is twice differentiable at x = 0
Maths-General
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Let f :(-1,1) R be a differentiable function with f (0) = -1 and 
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Maths-General
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Atransparentsolidcylindricalrodhasarefractiveindexof 
Itissurroundedbyair.Alightrayisincidentatthemid-pointofoneendoftherodasshowninthefigure.
Theincidentangle0forwhichthelightraygrazesalongthewalloftherodis:
Atransparentsolidcylindricalrodhasarefractiveindexof Itissurroundedbyair.Alightrayisincidentatthemid-pointofoneendoftherodasshowninthefigure.
Theincidentangle0forwhichthelightraygrazesalongthewalloftherodis:
Physics-General
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In the figure shown, Lisa converging lens of focal length10cmandMisaconcavemirrorofradiusofcurvature20cm. A point object O is placed in front of the lens at adistance15cm.ABandCDareopticalaxesofthelensandmirror respectively. The distance of the final image fm:_medby this system from the optical centre of thelens is x26 cm.Findthevalueof xincm.[ThedistancebetweenCDandABis1cm]
In the figure shown, Lisa converging lens of focal length10cmandMisaconcavemirrorofradiusofcurvature20cm. A point object O is placed in front of the lens at adistance15cm.ABandCDareopticalaxesofthelensandmirror respectively. The distance of the final image fm:_medby this system from the optical centre of thelens is x26 cm.Findthevalueof xincm.[ThedistancebetweenCDandABis1cm]
Physics-General
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Atelescopehasanobjectiveoffocallength100cmandaneyepiece of focal length 5 cm. What is the magnifying power of the telescope when the fina limage is formedat the least distance of distinctvision
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Physics-General
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The position of final image formed by the given lenscombination from the third lens will be at a distance of(
=+10cm,
=-10cmand
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Physics-General
Physics-
pressure exerted by anelectro magnetic wave of intensity I(watts/
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Physics-General
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The figure shows graphs of the electric field magnitude Eversus time t for four uniform electric fields, all containedwithin identical circular regions. Which of them is accordingtothemagnitudesofthemagneticfield?
The figure shows graphs of the electric field magnitude Eversus time t for four uniform electric fields, all containedwithin identical circular regions. Which of them is accordingtothemagnitudesofthemagneticfield?
Physics-General
Physics-
Intensity of electro magnetic wave will be
Intensity of electro magnetic wave will be
Physics-General
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Thefigureheregivestheelectricfieldof anelectromagneticwave at a certain point and a certain instant. The wave istransporting energy in the negative z-direction. The directionofthe magneticfieldofthewaveatthatpointand instantis
Thefigureheregivestheelectricfieldof anelectromagneticwave at a certain point and a certain instant. The wave istransporting energy in the negative z-direction. The directionofthe magneticfieldofthewaveatthatpointand instantis
Physics-General
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InanLCRcircuitasshownbelow bothswitches areopen initially. Now switch 
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Physics-General
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In a nelectri calcircu itR ,L,Candana.c.voltagesourceare all connected in series. When L is removed from the circuit,the phase difference between the voltage the current in the circuit is n/3. If instead, C is removed from the circuit, the phase difference is again n/3. The power factor of the circuitis:
In a nelectri calcircu itR ,L,Candana.c.voltagesourceare all connected in series. When L is removed from the circuit,the phase difference between the voltage the current in the circuit is n/3. If instead, C is removed from the circuit, the phase difference is again n/3. The power factor of the circuitis:
Physics-General
