152094867 Sr Physics Chapter Wise Important Questions (1)

8/9/2019 152094867 Sr Physics Chapter Wise Important Questions (1)

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VanithaTV GUIDE education & SR Inter - Maths Physics

Page No !

SENI"R INTER P#$SICS

IMP"RT%NT UESTI"N '%N( 'y Srigayatri

P#$SICS

')UE PRINITUnits Name o* the cha+ter ,eightage

mars ,a.e Motion /0

I. Ray o+tics and o+tica1 Instruments /2

P h y s i c a 1 o + t ic s / 2

II. Magnetism /3

E 1 ectr o s t a t ics / 3

C u r r e n t e 1e ctr ic i ty / 0


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Page No 4

IV. E1ectro magnetics !4

III Thermo-e1ectricity /2

%tomic +hysics /3

V Nuc1ear +hysics /0Semi-conductor de.ices /0

Communication systems /4

Tota1 mars 53

UESTI"N '%N( %N%)$SISSN"

N%ME "6 T#E )% S%

C#%PTER 777 77 7 777 77 7VS% PR"')EMS

! ,%VEM"TI"N 8 ! - 8 9 ! !8 !4

4 R%$ "PTICS - - - 5 4 9 !5 8

9 P#$SIC%) "PTICS - - - 3 4 - 5 !

2 M%GNETISM - - - 2 9 4 : 2


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Page No 9

8 E)ECTR"ST%TICS - - - 8 4 ! !2 8

3CURRENT

E)ECTRICIT$4 9 - ! 4 - : 4

5T#ERM"

E)ECTRICIT$- - - 2 - - ! 4

0E)ECTR"

M%GNETICS8 - ! 9 9 - : 8

: %T"MIC P#$SICS - - - 2 ! - 3 4

!/ NUC)E%R P#$SICS ! ! - 9 4 2 5 !

!!SEMI C"NDUCT"R

DEVICES4 - - 9 4 ! 2 !

!4C"MMUNIC%TI"N

S$STEMS- - - - - - 8 -

SU' T"T%) !8 8 ! 28 44 !4 !/9 2/

T"T%) 4! 5: !/9 2/


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, % VEM"TI"N )"NG %NS,ER UESTI"NS

1***. Explain the formation of stationary waves in stretched strings and hence deduce thelaws of transverse waves in stretched string ;Mar< 4//:=

2***. State laws of transverse vibrations in stretched strings. Explain how do you verifythem using sonometer. ;Mar< 4//8< 4//5=

***. !hat are "#armonics$ and %vertones$& #ow are they formed in an open pipe&'erive the e(uations for the fre(uencies of the harmonics produced in an open

pipe. )***.!hat are harmonics& #ow are stationary waves formed in a closed pipe&Explian the various modes of vibrations in a closed pipe and establish the relation between

their fre(uencies& ; May< 4//:=

***. !hat is 'oppler effect& +ind an expression for the apparent fre(uency heard whenthe source is in motion and the listener is at rest. !hat is the limitation of 'oppler effect& ;M 4//3=

,**. !hat is 'oppler-s shift& 'erive an expression for the apparent fre(uency heard bya moving listener when the source of sound is at rest. !hat is the effect of themovingmedium on the 'oppler effect

S#"RT %NS,ER UESTI"NS1***. !hat are beats& Explain the importance of

beats. 2***. !hat are applications of 'opplerEffect-&***. 'efine "/bsorption coefficient$ and 0everberation time$. State and explain

Sabine-s formula for reverberation time in a closed auditorium. ;Mar<4//0=

)***. 'efine an echo. !hat is the minimum distance re(uired to form an echo. !rite itsapplication ;Mar< 4//3=

***. !rite the condition for the construction of good auditoria.

,**. Explain the reflection of waves at closed and open ends.**. Explain the characteristics of a sound note.**. !hat is 0esonance& Explain with an example.3*. !hat is 'oppler effect& 'erive an expression for the apparent fre(uency of a note4

when source of sound and observer are approaching each other.R % $

"PTICS S#"RT %NS,ERUESTI"NS

15***. !hat is total internal reflection& State the conditions to be fulfilled for total internalreflection

11***. 'escribe the construction and wor6ing of an optical fibre. Sate its uses. ;M/3< /0=12***. 'istinguish between an astronomical telescope and a terrestrial telescope.1***. 'escribe 0ams dens- eye piece with the help of a neat s6etch. Explain its

advantages and disadvantages ;Mar< 4//:< 4//5=1)***. 'escribe #uygens eye piece with the help of a neat s6etch. Explain its advantages

and disadvantages.1***. !hat are pure and impure spectra. State the conditions to produce a pure spectrum.1,***. !ith the help of a ray diagram4 illustrate the formation of the final image of anob7ect in

a compound microscope. 'erive an expression for its magnifying

power. 1**. !hat are lens aberrations& 8ive reasons for them.


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1**. Explain the wor6ing of a simple microscope and find an expression for itsmagnifying power.

13*. !hat is dispersion& 'efine a physical (uantity which depends only on the materialof the prism for its dispersion. %btain an expression for it.

25*. State the significance of emission and absorption spectra.21*. 'erive the expression for refractive index of material of the prism.


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P#$SIC%) "PTICSS#"RT %NS,ER UESTI"NS

22***. !rite about the main features in which +raunhoffer and +resnel approaches ofdiffraction

differ&2***. 9ention some :at least four; applications of diffraction ;March< 4//5< 4//8=2)***. !hat the applications of polariara and +erromagnetisms in matter.***. 'erive an expression for the magnetic induction at a point on the axial line of a

bar magnet. ;March< 4//:=)**. 'erive an expression for the magnetic induction at a point on the e(uatorial line of

a bar magnet.*. Explain tan / and tan ?- positions of a deflection magnetometer. ;March< 4//:=,**. Explain the theory to determine magnetic moment of a bar magnet and #ori


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:ii; / point on the surface of the shell and :iii; / point inside theshell. ),*. State and explain Aoulombs law. 'erive it from 8auss law.


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CURRENT E)ECTRICIT$)"NG %NS,ER UESTI"NS

***. State and explain Birchhoff-s law in electricity and apply them to !heatstone bridge

to obtain its balancing condition ;Mar< 4//0< 4//3=***. Explain the principle of meter bridge. 'escribe an experiment for the determination

of un6nown resistance of a wire.3**. 'efine electric current4 drift velocity and mobility of charge carriers in a conductor.

'erive the relation between electric current and drift velocity of charge carriers in aconductor.15**. Explain the principle of potentiometer. 'escribe an experiment for the comparison

of emf-s of two cells.11**. 'escribe the construction and principle of potentiometer and explain how theinternal

resistance of a cell is determined using potentiometer.S#"RT %NS,ER UESTI"NS

)***. !rite short notes on thermistor.)**. !rite short notes on bac6 emf and internal resistance of a cell ;May< 4//:=

)3**. State and explain %hm-s law. 'efine %hm.T#ERM" E)ECTRICIT$S#"RT %NS,ER UESTI"NS

5***. !rite short notes on the wor6ing of a thermopile.1***. Explain construction and wor6ing of 'ud dell-s thermo galvanometer.2***. what is seebec6 effect. Explain how thermo emf varies with temperature in a

thermocouple4 define neutral and invertion temperature.***. !hat are >eltier and @homson effects& 'efine their coefficients ;March< 4//:=

E)ECTR" M%GNETISM)"NG %NS,ER UESTI"NS

12***. %btain an expression for the tor(ue on a loop placed in a uniform magnetic filed.'escribe the construction and wor6ing of moving coil galvanometer&;M/3< /:< May< 4//3< May< 4//:=

1***. 'escribe the growth and decay of current in an inductance4 resistance circuit. #owthe

growth and decay are affected with different values of inductance discuss& ;M/5=1)***. #ow is a galvanometer converted into an ammeter& !hy parallel resistance is

smaller than galvanometer resistance& Explain ;March< 4//8=1***. 'escribe the growth and decay of current in resistance4 capacitance circuit& 'efine

time constant. ;March< 4//5=

1,***. #ow is a galvanometer converted in to a voltmeter& !hy series resistance is greater than galvanometer resistance& Explain ;March< 4//8=

1*. %btain an expression for impedance and current in series CA0 circuit. 'educean expression for the resonating fre(uency of an CA0 series resonating circuit.S#"RT %NS,ER UESTI"NS

)***. State and explain Cen


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**. State the principle on which a transformer wor6s. 'escribe the wor6ing of atransformer with necessary theory. 9ention its uses. ;May< 4//3=

**. State and explain ?ioDSavart law.3**. Explain instantaneous4 maximum4 and rms values of a current.


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% T "MIC P#$SICSS#"RT %NS,ER UESTI"NS

,5***. !hat is 9oseley-s law& 'iscuss briefly its importance. ;March< 4//8=,1***. 'escribe the origin of Dray spectra. Explian continuous and characteristic xDray

spectrum ;March< 4//5=,2***. 'efine specific charge& 'escribe @homson-s experiment to determine eFm of an

electron with relevant theory. ;May 4//3< Mar 4//0=,***. !hat is photo electric effect& 9ention the laws of photoelectric effect. Explain

these laws using Einstein-s e(uation of photo electric effect& ;Mar 4//8< 4//:=,)**. 8ive the applications of photoelectric cells.NUC)E%R P#$SICS

)"NG %NS,ER UESTI"NS1***. Explain the principle and wor6ing of a nuclear reactor with the help of a labeled

diagram ;Mar /:=13**. 'efine binding energy. #ow does binding energy per nucleon vary with massnumber&

!hat is it significance.S#"RT %NS,ER UESTI"NS

,***. !hat are mass defect and binding energy& #ow is mass defect related to binding

energy& ;March< 4//3< May< 4//:=,,***. 'efine the term decay constant- for a radioactive substance. 'educe the relation

between decay constant and half life period. ;May< 4//:=,***. Explain the source of stellar energy. Explain the carbonDnitrogen cycle and

protonD proton cycle occurring in stars. ;Mar 4//3< 4//5=,**. !rite a note on ?reeder reactor-.,3**. !rite a short note on the discovery of neutron.5* 9ention the uses of radioisotopes. ;Mar 4//0=1*. !hat is nuclear fission& Explain li(uid drop model of nuclear fission&*2*.

'ifference between nuclear fusion and nuclear fission.

*. State the properties of α 4 β 4γ ray.SEMI C"NDUCT"RS

)"NG %NS,ER UESTI"NS25***. !hat is rectifier& Explain wor6ing of half wave and full wave rectifiers with

diagrams 9ention the expression for its efficiency& ;Mar 4//:< 4//8< 4//5=21***. 'escribe a transistor and explain its wor6ing. ;Mar 4//0=

S#"RT %NS,ER UESTI"NS)***. Explain the operation of G%@ gate and give its truth table.***. !hat is a Hener diode& Explain how it is used as voltage regulator,***. 'efine G/G' and G%0 gates. 8ive their truth tables.

** 'iscuss the behaviour of a pDn 7unction. #ow does a potential barrier develop atthe 7unction.

**. !hat is a 7unction diode. Explain the formation of depletion layer at the 7unction.Explain the variation of depletion layer in forward and reverse biased condition.

3* 'raw and explain the currentDvoltage :IDV; characteristic curves if a 7unction diodein forward and reverse bias.

VER$ S#"RT %NS,ER UESTI"NS, % VE

M"TI"N1. !hat is the phase difference between incident and reflected waves at a; an open

end and b; closed end&


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2. !hat happens to the fundamental fre(uency of a stretched string when its lineardensity becomes1F)thof its initial value& ;Mar 4//3-4//5=


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. !hat is the ratio of the fre(uencies of harmonics in an air column of same length ina; a closed pipe and b; an open pipe

). 9ention any two applications of beats.. !hat are "+ocusing$ and "Echelon effects$&,. !hat do you mean by reverberation time an auditorium. !hat is sound absorber. 8ive two examples for good absorbers. ;Mar 4//3=. @he length of a wire vibrating with a fre(uency of )5 #< is 1m . It its length

is changed to 1., m4 find the fre(uency.

3. Game any two musical instruments whose wor6ing depends on transverse vibrationsof a string ;M 4//0=15. !hat is reverberation& !ho is the founder of architectural acoustics&

;M/8< May 4//3=11. !hat is Gewton-s formula for velocity of sound in a gas& #ow is it corrected

by Caplace&12. !hat is "End correction$ in resonating air column&1. !hat happens to the fre(uency of a tuning for6 a; !hen it is loaded with a little

wax and b; !hen it is filed&1). !hat is "/bsorption coefficient$& which is a better absorber of sound4 glass or fibre

glass&1. !hat is the ratio of the fre(uency of fourth overtone to the fundamentalfre(uency of a stretched string&

R % $ "PTICS1,. 8iven the ratio of velocities of two light waves traveled in vacuum and having

wave lengths 555/o and ,555/o.

1. !hy do diamonds spar6le&1. !hat is normal ad7ustment of a telescope& In !hat way it is better&13. !hat is the use of erecting lens in a terrestrial telescope& !hat is its magnification&25. !hat are the advantages of 0ams den-s eyepiece&

21. !hat are the demerits of #uygens- eyepiece&22. @he angles of deviations for violet and red colors of a crown prism are .2o and

.1o

respectively. +ind the dispersive power of the prism& ;Mar 4//8=2. @he measurements ta6en in 0amdesns eyepiece more worthy :reliable; than

#uygens eyepiece. !hy& ;Mar 4//3=2). 'efine critical angle. 9ention its relationship with refractive index. ;M/5< May

4//3=2. If the refractive index of a medium is 1.4 find the critical angle.2,. !rite the difference between microscope and telescope. ;May 4//:=

2. 9ention the types of chromatic aberration ;Mar 4//0=2. !hat are +raunhoffer lines& Explain their origin.23. State and explain #uygens- principle.5. State the conse(uences of total internal reflection.1. !hat is an optical fiber& State its principle.2. Aan we minimi


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). If =oung- two slit interference experiment is done with white light what would be observed&


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. If a polari


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potential at point > (2m4 2m) .


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. +ind the

. 1A of charge is e(ual to the charge of n number of electrons in magnitude. !hat isthe value of n&

3. !hat happens to the force between two charges if the distance between them is a;halved b; doubled&


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,5. / charge ( of mass m starting from rest is allowed to move between two plateshaving a potential difference of V volt. !hat is the final velocity of it&

,1. 0epulsion is the sure test of electrification than attraction. !hy&,2. !rite down the uses of capacitors&

CURRENT E)ECTRICIT$,. !hat are ohmic and non ohmic devices& 8ive examples,). @he manganin wire is used in the preparation of standard resistances. !hy&,. #ow many electrons flow through a wire when 1/ current passes for 1 millisecond&

;May 4//3=,,. !rite two differences between emf and p.d. ;Mar 4//8=,. !hich of two4 namely voltmeter and potentiometer is preferable to measure the

emf of a batter& !hy&,. !hen is the series combination of cells advantageous and why& ;Mar 4//3=,3. !hen is the parallel combination of cells advantageous and why& ;Mar 4//:=5. !hat is internal resistance of a cell& !rite the value of internal resistance of an ideal

cell.;May 4//:=

1. !hat is the specific resistance of material of a conductor.

9ention its units. ;M/8= T#ERM" E)ECTRICIT$2. !hat are thermoelectric refrigerators&E)ECTR" M%GNETISM

. !hat is the force on a conductor of length l carrying current -i- when it issituated in a magnetic field of induction ?& !hen is it maximum& ;Mar 4//5=

). State +leming-s left hand rule.. 'efine coefficient of self induction4 coefficient of mutual induction.,. !hat type of transformer is used in a bed lamp.. !hat is transformer ratio&

. / current of 2/ is passed through a coil of 1555 turns to produce a flux of 5.µwb .

Aalculate the self inductance of the coil ;Mar 4//0=3. @he current in a coil changes of / to 15/ in 15D2 s. @hen an emf of 5 mill volts is

induced in a coil neat it. Aalculate the mutual inductance of the coil ;Mar 4//:=5. / coil of area 155 cm2 having 55 turns carries a current of 1m/. It is suspended in

a uniform magnetic field of induction 15D !bmD2. Its plane ma6es an angle of ,55

withthe lines of induction. +ind the tor(ue acting on the coil.

1. / stepDup transformer wor6s on 225V and gives 2/ to an external resistor. @heturn ratio between the primary and secondary coils is 2 J 2./ssuming 155Kefficiency4

find the secondary voltage. >rimary current and power delivered.% T "MIC P#$SICS

2. !hat is wor6 function of a metal ;March< 4//3=. !hat is Aompton effect&). If a proton and an electron have same de ?roglie wavelength4 which has more

momentum and 6inetic energy& ;March< 4//0=. Is photon a wave or a particle& !hat is its rest mass&,. Aan Dray produce photoelectric effect& Aalculate the wor6 function of a metal

production photo electrons with Drays of wavelength 1/o

. !hat is the e(uation of wavelength associated with a moving particle&

NUC)E%R P#$SICS


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. 8ive two important characteristics of nuclear forces&3. Geutrons are the best pro7ectiles of produce nuclear reactions. !hy&35. State any two properties of neutron. ;March< 4//0=


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31. !hat is thermal neutron& !hat is its importance&

32. !hat is annihilation of matter& 8iven an example3. !hat are isotopes and isobars

3). !hat will be the ratio of the radii of two nuclei of mass numbers /1

and /2

SEMI C"NDUCT"RS3. !hat are the ma7ority and minority charge carriers in a pDtype semi conductor&

;M/0=3,. #ow is a battery connected to a 7unction diode in 1; forward and 2; reverseDbias&

3. !hich gates are called universal gates&3. 'raw the circuit symbols of pDnDp and nDpDn transistor.C"MMUNIC % TI"N S$STEMS

33. !hat are the basic bloc6s of communication system&155. !hat is s6y wave propagation&151. 'efine modulation. !hy is it necessary& ;March< 4//:=152. !hat is "!orld !ide !eb$ :!!!;&15. 9ention the fre(uency range of speech signals.

PR"')EMST#REE ST%R UESTI"NS

, % VEM"TI"N

1. @wo sound waves of lengths 3 and 15 meters produce ) beats in 3 seconds.+ind the velocity of sound.

2. @wo tuning for6s give ) beats per second when sounded simultaneously. @hefre(uency of one of the for6s is ) #


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15. >rogressive transverse wave is given by the e(uation

:i; amplitude :ii; fre(uency :iii; velocity and :iv; wave

length.

. +ind its

11. @wo wires are fixed on a sonometer wire. @heir tensions are in the ratio J 14the lengths in the ratio , J 4 the diameters in the ratio ) J1 and densities in theratio 1J 2.If the string of higher pitch has a fre(uency of ,5 #< calculate the fre(uency of theother string.


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12. / rectangular class room of volume 25 x 1 x 15m has a surface whose averageabsorption coefficient is 5.5 metric Sabine. Aalculate the time of reverberationof the room. !hen a material of area 155 m2 is brought into the room4 thereverberation time falls to 2. seconds. Aalculate the absorption coefficient of thematerial&

R % $ "PTICS1. / prism of refracting angle )o is made of material of refractive index 1.,2. +ind its

angle of minimum deviation.1). +ind the critical angle of a denser medium of refractive index 1., for its interface

with air.1. @he focal length of a converging lens is cm. +ind its magnifying power when it is

used as a reading lens to form the image at near point.1,. @he refractive indices of flint glass prism for A4' and + lines are 1.35 4 1.3 and

1.5 respectively. +ind the dispersive power of the flint glass prism.1. @he refractive index of the material of a plane concave lens is 15F,. +ind its focal

length in air and in water as its radius of curvature is 5.m. @he refractive indexof water with respect to air is )F. ;March< 4//3=

P#$SIC%) "PTICS

1. /n un polari


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plate area to have a capacitance of 2p+& :ta6e

εo

= .*×15−12

A2 G

−1m

−2 ;

2. @wo point charges of magnitude

,µc 4

are separated by a certain distance in air

the

force between them is 2G. +ind the force between them if a; the distance between them is increased by times b; the distance between them isdecreased by times.

CURRENT E)ECTRICIT$2. +ind the balance length in a meter bridge4 if the resistance in the left and right gaps is

inthe ratio of 2J . ;March< 4//5=


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23. / wire of resistance 15 ohm is elongated by 15K. +ind the resistance of theelongated wire. :hintJ when the same wire is elongated4 the volume of the wireremains constant ;

T#ERM" E)ECTRICIT$5. @he neutral temperature of a thermocouple is 15oA. !hat is the temperature of

inversion when the cold 7unction at 25oA& ;Mar 4//0< 4//5=1. @he temperature of inversion of ironD copper thermocouple is 35oA and cold

7unction temperature is 5oA. !hat is the neutral temperature&

E)ECTR" M%GNETISM2. / long straight conductor carrying a current of 2/ is in parallel to another

conductor of length cm and carrying a current /. @hey are separated by adistance of 15cm..Aalculate a; ? due to first conductor at second conductor b; @he force on theshort conductor

. / coil of area 155 cm2 having 55 turns carries a current of 1m/. It is suspended inauniform magnetic field of induction 15D !bmD2. Its plane ma6es an angle of ,5o

with the lines of induction. +ind the tor(ue acting on the coil.

). @he resistance of galvanometeris

. / shuntof

is connected to it. If the main

current is 15D2/4 what is the current flowing through the galvanometer&. / wire of 15cm length is placed in a uniform magnetic field of induction 5.52@

ma6ing4 an angle of 5o with it. If / of current flows through it calculate forceacting on it

;M/3=,. @wo un6nown resistances > and O are connected in left and right gaps of a meter

bridge and balancing point is obtained at ,5cm from the left. !hena

resistance

is connected in parallel to > the balance point is at 5cm . Aalculate > and O;May< 4//:=

%T"MIC P#$SICS

. !or6 function of a metal is .5eV. It is135

26Ω35+53ΩeµΩ/

by a light of

wavelength x 15D m.Aalculate the maximum energy of the electron.

. +ind the momentum of an electron having wavelength 2/ : h N ,.,2 x 15D) Ps; ;M/3=

3. +ind the binding energy

of

NUC)E%R P#$SICS

. /tomic mass of +e is .3)3 u and that of

hydrogen

is 1.555 u. 9ass of neutron is 1.55, u.

SEMI C"NDUCT"RS

)5. In a transistor circuit the base current changes from 5µ/

to

. @he corresponding

i2l,luminat


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change in the collector current is from 5.2m/ to ).2 m/. +ind the current gain.

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152094867 Sr Physics Chapter Wise Important Questions (1)