1

Class – XII

fo"k;&HkkSfrd foKku@Sub-PHYSICS fo"k; dksM&311@Sub. Code-311

I. cgqfodYih iz'u@Multiple Choice Question :

1. A convex lens has focal length +20cm, its power is ...............

(a) +5D (b) -5D (c) +0.05D (d) 100D

2. Electric resistivity has unit .......................

(a) Ohm (b) Volt (c) Ohmxm (d) ampere

3. Power factor for LCR - resonant circuit is ..................

(a) (b) (c) zero (d) 0.5

4. Core of a transformer is made of

(a) soft Iron (b) Hard Iron (c) Copper (d) Zinc

5. ................... wave can be polarised

(a) Sound (b) Light (c) Heat (d) Wind

6. What is the relationship between de Broglie's wavelength and momentum ?

(a) h + p (b) ℎ

𝑝 (c) h × p2 (d)

𝑝

ℎ

7. A.C. source of frequency 50 Hz is applied cross a half wave diode rectifier. What is the

frequency of output ?

(a) 50 Hz (b) 25 Hz (c) 100 Hz (d) Zero

8. 3

A 3 3 B

The equivalent resistance between 'A' & 'B' could be

(a) 3 (b) 9 (c) 1 (d) 2

9. Van be Greaf generator is ...............

(a) Mass accelator (b) Charge accelator

(c) Light accelator (d) a simple device which is used to produce - particle

2

10. ......................... Radiation is producing intense heat.

(a) Ultra-violet (b) Infra-red (c) Sound (d) None of these

11. Å"ek&pkydrk dh vk;ke gSa

The dimension of thermal conductivity is

(a) [MLT-2

K] (b) [MLT-2

K-1

] (c) [MLT-3

K-1

] (d) [MLT-3

]

12. fuEufyf[kr esa dkSu lh jkf'k;k¡ lfn'k gSa

¼d½ rki ¼[k½ fo|qr /kkjk

¼x½ vkosx ¼?k½ vk;ru

Which of the following is a Vector Quantity

(a) Temperature (b) Electric Current

(c) Impulse (d) Volume

13. 100 fd-xzk- æO;eku dh ,d oLrq dks [khapus ds fy, 4 kg-wt.cy dh vko';drk

gksrh gS oLrq vkSj lrg ds chp ?k"kZ.k&xq.kkad gS

Force required to pull a body of 100 kg is 4 kg-wt.. The coefficient of friction

between the body and the surface is

(a) 0.1 (b) 0.01 (c) 0.04 (d) 0.04N

14. m rFkk 9m æO;eku ds nks d.k ;fn leku xfr ÅtkZ ls xfreku gks rks muds jSf[kd

laosx dk vuqikr

Two particles of masses m and 9m are moving with same kinetic energy, their ratio of

Linear momentum will be

(a) 2 : 3 (b) 3 : 1 (c) 3 : 2 (d) 1 : 3

15. ,d xksyh; [kksy ds Hkhrj fdlh fcUnq ij xq:Roh; {ks= dh rhozrk gksrh gS

¼d½ 'kwU; ¼[k½ vuar

¼x½ ogh tks ckgjh lrg ij ¼?k½ buesa ls dksbZ ugha

The intensity of gravitational field inside a spherical shell at any point is :

(a) Zero (b) Infinity

(c) Same which is at outer surface (d) None of these

3

16. izfrcy rFkk foÑfr dk vuqikr dgykrk gS

¼d½ i`"B ruko ¼[k½ ?k"kZ.k&xq.kkad

¼x½ izR;kLFkk&xq.kkad ¼?k½ ';kurk&xq.kkad

The ratio of stress and strain is called

(a) Surface Tension (b) Coefficient of Friction

(c) Coefficient of Elasticity (d) Coefficient of Viscosity

17. lkcqu ds cqycqys ds vUnj vfrfjDr nkc lekuqikfr gksrk gS

¼d½ bldk f=T;k ds ¼[k½ blds æO;eku ds

¼x½ ok;qeaMyh; ncko ds ¼?k½ i```"Bruko ds

Excess pressure inside a soap bubble is proportional to

(a) Its Radius (b) Its Mass

(c) Atmospheric Pressure (d) Surface Tension

18. Hkki dh fof'k"V xqIr Å"ek dk eku gS

Specific Latent heat of vapour

(a) 80 kcal/kg (b) 536 kcal/kg

(c) 4.2 kcal/kg (d) 1 kcal/kg

19. tc fdlh xSl esa :)ks"e ifjorZu gksrk gS rc fuEufyf[kr esa dkSu lk laca/k lR; gksrk

gSA

¼d½ PV = fu;rkad ¼[k½ PV = fu;rkad

¼x½ P/V = fu;rkad ¼?k½ buesa ls dksbZ ugha

Which relation is true when there is adiabatic change in a gas

(a) PV = Constant (b) PV = Constant

(c) P/V = Constant (d) None of these

20. fdlh /kkrq dk Å"ek&pkydrk xq.kkad fuHkZj djrk gS

¼d½ nksuksa lrgksa ds rkikarj ij ¼[k½ /kkrq IysV dh HkqVkbZ ij

¼x½ IysV ds {ks=Qy ij ¼?k½ buesa ls dksbZ ugha

Coefficient of thermal conductivity depends on

4

(a) Temperature difference between two surfaces

(b) Thickness of metal plate

(c) Area of Plate

(d) None of these

21. tc 356 vkSj 350 vko`fÙk okys Loj&f}'kwy dfEir fd;s tkrs gSa rks izfr lsds.M foLiUn

gksxk

¼d½ 6 ¼[k½ 706 ¼x½ 350 ¼?k½ buesa ls dksbZ ugha

When tuning fork of frequency 356 and 350 are vibrated then Beats per second will be

(a) 6 (b) 706 (c) 350 (d) None of these

22. 20 cm Qksdl nwjh ds mÙky ysal dh {kerk

¼d½ &10 Mk;ksIVj ¼[k½ $ 10 Mk;ksIVj

¼x½ &5 Mk;ksIVj ¼?k½ $5 Mk;ksIVj

The power of a convex lens of focal length 20 cm is

(a) –10 Dioptre (b) +10 Dioptre

(c) –5 Dioptre (d) +5 Dioptre

23. ;fn nks dyklEc) L=ksrksa dh nwjh 2d gks izdk'k dk rjax&nS/;Z gks rFkk L=ksr ls insZ

dh nwjh D gks rks fÝat dh pkSM+kbZ

If the distance between two coherent source be 2d, the wave lengthof light be

and distance of the screen from the source be D, then fringe width is

(a) D

2d (b)

.2d

D (c)

2dD

(d)

D

.2d

24. vkfo"V [kks[kys xksys ds vUnj fo|qrh; rhozrk

¼d½ 'kwU; ¼[k½ vuar

¼x½ fu;r ¼?k½ ifjorZu'khy gksrk gS

The electric intensity inside a charged hollow sphere is

(a) Zero (b) Infinity

(c) Constant (d) Variable

5

25. rkEck gksrk gS

¼d½ izfr pqEcdh; ¼[k½ yksg pqEcdh; ¼x½ vuqpqEcdh;

Copper is

(a) Diamagnetic (b) Ferromagnetic (c) Paramagnetic

26. LoizsdRo dh bdkbZ gS

¼d½ oscj ¼[k½ vkse ¼x½ gsujh

The unit of self induction is

(a) Weber (b) Ohm (c) Henry

27. ;fn izR;korhZ /kkjk dk lehdj.k 0-5 sin 100t gS rks bldh vko`fÙk gS

¼d½ 50 gV~~tZ ¼[k½ 100 gV~tZ ¼x½ 25 gV~~tZ

If the equation of an alternating current is 0.5 sin 100 t, its frequency is :

(a) 50 Hertz (b) 100 Hertz (c) 25 Hertz

28. fuEufyf[kr fo|qr pqEcdh; rjaxksa esa fdldh rjax nS/;Z lcls de gS

¼d½ ,Dl fdj.k ¼[k½ jsfM;ks rjax ¼x½ xkek fdj.k ¼?k½ Vsfyfotu rjax

Which of the following has the shortest wavelength

(a) x-rays (b) Radio Waves (c) - rays (d) Television Waves

29. vkEehVj dks fo|qrh; ifjiFk ds

¼d½ Js.khØe esa tksM+k tkrk gS

¼[k½ lekarj Øe esa tksM+k tkrk gS

¼x½ nksuksa esa ls fdlh Hkh rjg tksM+k tkrk gS

¼?k½ buesa ls dksbZ ugha

Ammeter is connected in the electrical circuit

(a) In series (b) In Parallel (c) In any one of them (d) In none of them

30. vYQk d.k gS

¼d½ bysDVªkWu ¼[k½ fo|qr pqEcdh; fofdj.k

¼x½ ghfy;e U;wfDy;l ¼?k½ gkbMªkstu U;wfDy;l

6

- Particle is

(a) Electron (b) Electromagnetic

(c) Helium nucleus (d) Hydrogen Nucleus

(e) Neutron.

31. fuEufyf[kr esa ls dkSu fo|qrh; {ks= ls Rofjr ugha gksrk gS

¼d½ izksVksu ¼[k½ U;wVªku ¼x½ vYQk d.k ¼?k½ bysDVªku

Which of the following is not accelerated by electric field

(a) Proton (b) Neutron (c) -Particle (d) Electron

32. fuEufyf[kr fp= esa A vkSj B ds chp lerqY; izfrjks/k D;k gS

In the following diagram, what is the equivalent resistance in between the

points A and B.

(a) 4 Ohm (b) 6 Ohm (c) 12 Ohm (d) 2 Ohm (e) buesa ls dksbZ ugha

(a) 4 Ohm (b) 6 Ohm (c) 12 Ohm (d) 2 Ohm (e) None of these

33- iSLdy fdldh bdkbZ gS \

¼d½ cy ¼[k½ ncko ¼x½ osx ¼?k½ 'kfDr

Pascal is unit of

(a) Force (b) Pressure (c) Velocity (d) Power

34- ;fn -------------------------- rks bldk ifjek.k D;k gS \

If ...................... what is its magnitude ?

(a) 3 (b) 4 (c) 29 (d) 1

35- x - v{k vkSj y - v{k ij iz;qDr cy dk ifjek.k D;k gS \

What is magnitude of applied force along X-axis and Y-axis ?

Figure

(a) 100 N, 100 2 N (b) 100 N, 100 N (c) 50 2 N, 50 2 N (d) 0 N, 100 2 N

36- cy vk?kw.kZ vkSj dks.kh; laosx ds chp laca/k D;k gksrk gS \ [T = cy vk?kw.kZ] L = dks.kh;

laosx] t = le; ]

7

The relationship between torque and angular momentum could be [where T =

torque, L = angular momentum, t = time]

(a) T = 𝐿

𝑡2 (b) T = 𝑑𝐿

𝑑𝑡 (c) T =

𝐿2

𝑡 (d) T = L × t

37- fuxZe osx vkSj d{kh; osx ds chp D;k varj gS \

What is the relationship between escape and orbit velocity ?

(a) 𝑣𝑒= 2 × 𝑣0 (b) 𝑣𝑒 = 𝑣𝑜

2 (c) 𝑣𝑒 = 𝑣𝑜 (d) 𝑣𝑒 =

𝑣02

4

38- foLdkflrk xq.kkad dk vk;ke D;k gS \

The dimension for different of viscosity is

(a) MLT-2

(b) MLOT (c) ML

-1T

-1 (d) M

-1LT

39- rkiØe c<+us ij ,d xSl ds v.kq dk :V ehu LDok;j osx

¼d½ c<+ tkrk gS ¼[k½ ?kV tkrk gS

¼x½ ifjofrZr ugha gksrk gS ¼?k½ igys ?kVrk gS fQj c<+rk gS

By increasing temperature, root mean square valocity of gas molecules ?

(a) increases (b) decreases (c) cannot change (d) first decreases then

increases

40- flEiy gkeksZfud lks'ku (S.H.M.) dks lgh dkSu lk lehdj.k n'kkZrk gS \

Select a correct equation which can represent S.H.M.

(a) x = sin2t (b) x = sin

2t + cos

2t (c) x = a sin t (d) x =

1

𝑎 tan t

41- 200 Hz vkSj 204 Hz vko`fÙk;ksa ds nks V~~~;wfuax QkWdZ dks ,d lkFk ctk;k tkrk gSA

mRiUu chV D;k gksxk \

Two tuning forks having individual frequencies 200 Hz and 204 Hz sounded

together. What is the number of beats produced ?

(a) 4 (b) 202 (c) 0 (d) 2

42- ,dijek.kqd xSl ds fy, 𝑐𝑝

𝑐𝑣 gksxk

For a monatomic gas 𝑐𝑝

𝑐𝑣 is

(a) 1.6 (b) 1.4 (c) 1.3 (d) 1.2

8

43- voLFkk ifjorZu ds le; ¼Bksl ls æo ;k æo ls xSl½] fof'k"V Å"ek dk eku D;k gS \

¼d½ 0 ¼[k½ ¼x½ _.kkRed ¼?k½ buesa ls dksbZ ugha

During the change of state (either from solid to liquid or liquid to gas), what is hte value

of specific heat ?

(a) 0 (b) (c) negative (d) none of these

44- 'A' vkSj 'B' ds chp rqY;kad /kkfjrk gksxh

The equivalent capacitance between A and B is

figure

(a) 2 F (b) 3 F (c) 6 F (d) 1.5 F

45. ,d rkj dk izfrjks/k gSA \

(a) 40 (b) 20 (c) 10 (c) buesa ls dksbZ ugha

A wire has resistance 10. If its length is made double stretching it, the new

resistance would be

(a) 40 (b) 20 (c) 10 (d) none of these

46- QsjkspqEcdh; inkFkZ dk ,d mnkgj.k gS

¼d½ rkez ¼[k½ ok;q ¼x½ ty ¼?k½ yksgk

_______________ is an example of ferromagnetic material.

(a) copper (b) air (c) water (d) iron

47- fuEufyf[kr fdldk ikoj QSDVj 1 ds cjkcj gksrk gS \ [ikoj QSDVj , lh lfdZV ds

fy, fudkyk x;k gSA]

¼d½ R-lfdZV ¼[k½ L-lfdZV ¼x½ C-lfdZV ¼?k½ LC-lfdZV

Power factor is equal to 1 for [Power factor is calculated for A.C. circuits.]

(a) R-circuit (b) L-circuit (c) C-circuit (d) LC-circuit

48- czqLVj ds fu;e ds vuqlkj] ¼tgk¡ i = vkifrr dks.k] viorZ.kkad½

According to Brewster's Law, (where i = angle of incidence, referactive index)

(a) tan i = (b) sin i = (c) cos i = (d) sin2 i =

9

49- ,d dEikmUM ekbØksLdksi esa ;fn yky cÙkh dks uhyk cÙkh ls cny fn;k tkrk gS] rks

bldh foHksnu {kerk

¼d½ c<+ tkrh gS ¼[k½ ?kV tkrh gS

¼x½ ugha cnyrh ¼?k½ igys c<+rh gS fQj ?kVrh gS

If red light is replaced by blue light in a compound miscoscope its resolving power

(a) increases (b) decreases (c) no change (d) first increases then

decreases

50- nks ijek.kqvksa dh ijek.kq la[;k dk vuqikr 1%27 gSA mudh ukfHkdh; f=T;kvksa dk vuqikr

D;k gS \

The ratio of the atomic numbers of two atoms is 1 : 27. What is the ratio of their

nuclear radias ?

(a) 1 : 3 (b) 1 :1 (c) 1:9 (d) 1: 2 3

51- ;g fuEufyf[kr dk ,d ykWftd izrhd gSA

It is a logic symbol for

figure

(a) OR gate (b) AND gate (c) NOR gate (d) NAND gate

52- Hkw rjaxksa ds fy, vko``fÙk lhek gksuh pkfg,

(a) 100 MHz ls vf/kd ¼[k½ 0 MHz ls de

¼x½ 105 MHz ls vf/kd ¼?k½ 1500 kHz ls de

Frequency range for ground wave should be

(a) more than 100 MHz (b) less than 0 Hz

(c) more than 105 MHz (d) less than1500 kHz

53- dksgjk vkSj dqgklk ds nkSjku ns[kus ds fy, fofdj.k dk iz;ksx

gksrk gSA

(a) bUÝk&jsM ¼[k½ vYVªk&ok;ysV ¼x½ ,Dl&js ¼?k½ vYQk&js

______________ radiation is used to see during fog and mist

(a) infra-red (b) Ultra-Violet (c) x-ray (d) - ray

10

54- dSFkksM fdj.k

(a) /kukRed vkosf'kr gksrh gS ¼[k½ fuf"Ø; gksrh gS

¼x½ _.kkRed vkosf'kr gksrh gS ¼?k½ buesa ls dksbZ ugha

Cathode ray is

(a) positively charged (b) neutral

(c) negatively charged (d) none of these

II. Fill in the blanks :-

1. When silicon is doped with Indium it is producing ........... type of semi-conductor.

(n-type/p-type)

2. Ammeter measures ....................... (current/voltage)

3. Astronomical telescope has ............ convex lenses. (2/3)

4. Balmar series is example of .................. obtained from Hydrogen. (Visible/Infra-red)

5. The relationship between decay constant and half life is =0.693

+ 1

2

, = 0.693 × 𝑡 1

2

III. Match the following :-

Group - A Group - B

1. Light pipe Rectifier

Equi-potential surface Nuclear Reactor

Nuclear-fission Total internal reflection

Drift velocity Va - Vb = 0

Diode m/sec

IV. vfr y?kq mÙkjh; iz'u@Very short Answer Type Questions

1. ?k"kZ.k dks.k vkSj fojke dks.k fdls dgrs gSa \

What is angle of friction and angle of repose ?

2. xq:Ro tfur Roj.k g vkSj xq:Rokd"kZ.k fu;rkad G esa D;k laca/k gS \

11

What is relation between acceleration due to gravity g and Gravitational Constant

G ?

3. lerkih vkSj :)ks"e izfØ;k fdls dgrs gSa\

Define isothermal and Adiabatic process?

4. la;ksftr la/kkfj;ksa dk lerqY; /kkfjrk Js.kh Øe esa Kkr djsaA

Find an equivalent capaticy for condenser grouped in series.

5. ukfHkdh; fo[k.Mu fdls dgrs gSa \

What is nuclear fission ?

6. VªkaftLVj izo/kZd dk ,d lfdZV vkjs[k cuk,¡A ¼dsoy vkjs[k cuk,¡½

Draw a circuit diagram for transistor amplifier. (Only diagram is required)

7. ,d xzkQ dh enn ls ,d ljy js[kk ij Rofjr xfr dks n'kkZ,aA

By the help of a graph, show accelerated motion taking place along a straight line.

8. dsIyj dk HkweaMyh; xfr dk fu;e D;k gS \

State Kepler's Laws of planetary motion.

9. voefUnr vkSj eqDr nksyu esa D;k vUrj gS \

What are the differences between damped and free oscillation ?

10. 1 eh- Hkqtk ds ,d leckgq f=Hkqt ds nks dksus vkSj 'A' vkSj 'B' ij nks vkoa'k +2C vkSj -

4C fn, x, gSaA 'C' dksus ij ifj.kkeh foHko Kkr djsaA

There are two charges +2C and -4C placed at two corners. A and B of an

equilateral triangle of side 1 m. Calcualte the resultant potential at corner C.

11. Økafrd dks.k D;k gS \ D;k bls ge izdk'k dk osx esa O;Dr dj ldrs gSa \

What is critical angle ? Can we express it in terms of velocity of light ?

12. VªkaftLVj vkWflysVj dk ,d lfdZV vkjs[k cuk,aA ¼dsoy vkjs[k cuk,a½

Draw a circuit diagram for transistor oscillator. (Only diagram is required.)

V. y?kq mÙkjh; iz'u@ Short Answer Type Questions

1. What is electric capacity ? Find out electric capacity due to a parallel plate capacitor in

absence of a medium ?

12

2. What is electric potential energy ?Give its expression for two charges separated by

certain distance ?

3. What are Faraday's laws of Electro-magnetic induction ? Define magnetic flux?

4. Why do you use suspension wire made of Phophorus - Bronze in a moving coil

Galvanometer ? What is lamp-scale arrangement ?

5. State and illustrate Huygen's wave theory of light ?

6. By help of a ray diagram, show the deviation produced by a prism for incident ray of

light. Draw a graph between angle of incidence and angle of deviation ?

7. Show that current lags by phase angle

2 when an inductor is connected with a.c.

source ?

8. Give atleast three differences between Nuclear fusion & Nuclear fission ?

9. lekukarj v{kksa dk izes; D;k gS \ bls izekf.kr djsaA

What is the theorem of Parallel Axis ? Prove it.

10. i`````̀`Foh dh lrg ls 'h' Å¡pkbZ ij rFkk 'h' xgjkbZ ij 'g' ds eku dk O;atd izkIr djsaA

Find the expression for 'g' at a height h of above the surface of earth and at a

depth 'h' below the surface of earth.

12. lerkih; izØe esa ,oa :)ks"e izØe esa vkn'kZ xSl }kjk laikfnr dk;Z dh x.kuk djsaA

Calculate the work done by an ideal gas during Isothermal Process and

adiabatic Process. 13. tc nks mÙky ysal ,d nwljs ls 'd' nwjh ls vyx gks rks

laca/k LFkkfir djsaA

1 1 1 d= + -f f f f f1 12 2

tgk¡ f1 = igys mÙky ysal dh Qksdl nwjh] f2 = nwljs mÙky ysal dh nwjh] f =

lerqY; mÙky ysal dh Qksdl nwjh

When two convex lences are separated by a distance 'd', establish the realtion :

1 1 1 d= + -f f f f f1 12 2

13

When f1 = focal length of first convex lence, f2 = focal length of second

convex lence, f = focal length of equivalent lens.

14. xksal ds izes; fy[ksa rFkk izekf.kr djsaA

State and prove Gauss' Theorem.

15. fdlh yEcs lh/ks pkyd ls cgrh gqbZ /kkjk ds dkj.k fdlh fcUnq ij pqEcdh; izsj.k dk

O;atd izkIr djsaA

Obtain an expression for magnetic induction at any point due to a long straight

wire carrying current.

16. 5 kg æO;eku dh ,d oLrq dks fojkekoLFkk esa 20 N dk cy fn;k tkrk gSA 10 Sec ds

ckn oLrq }kjk izkIr xfrt ÅtkZ dk eku D;k gksxk \

A body of mass 5kg initially at rest is subjected to a force of 20N. What is the

Kinetic Energy acquired by the body at the end of 10 sec ?

17. izR;korhZ /kkjk dk lehdj.k I = 100 sin 200t gSA /kkjk dh vko`fr (frequency) ewy

vkSlr /kkjk rFkk /kkjk dks 'kwU; ls egÙke eku rd igw¡pus esa fdruk le; yxsxk \

The equation of an A.C. is I = 100 sin 200t. Find the frequency of the current,

R.M.S. value and time for the current to attain peak value from zero.

18. pØh; xfr D;k gS \ f=T;h; Roj.k dk ,d lw= fudkysaA

What is circular motion ? Derive a formula for radial acceleration.

19. 0-5 m/s2 Roj.k ds lkFk bls Åij [khapus esa fdrus cy dh vko';drk gksxh ;fn xfrd

?k"kZ.k xq.kkad 0-5 fy;k tkrk gS \

How much force is required to pull the block up with acceleration 0.5 m/s2 if

coefficient of kinetic friction is 0.5 ?

figure

20. xSl ds xfrd fl)kar dh ewy ladYiuk dks ysdj okW;y dk fu;e fudkysaA

Deduce Boyle's Law taking a basic concept of kinetic theory of gas.

21. ,d lk/kkj.k isaMqye dh le; vof/k dk lw= Kkr djsaA

Deduce a formula for time period of a simple pendulum.

14

22. cxSj MkbbysDVªhd ds ,d lekukUrj IysV la/kkfj= dh bysDVªhd /kkfjrk dks Kkr djsaA

Find out electric capacitance of a parallel plate capacitor without dielectric.

23. 4 cm vkdkj dh ,d oLrq dks 10cm Qksdl nwjh okys ,d mÙky ysal ls 30cm dh nwjh

ij j[kk x;k gSA

An object of size 4 cm is placed at a distance of 30 cm from a convex lens of

focal length 10 cm. Find out its image. Also, identify its nature.

23. QksVks bysDVªhd bQsDV ds fu;e D;k gSa \

What are the laws of photoelectric effect ?

24. gkQ ykbQ fifj;M dks ifjHkkf"kr djsaA ,d jsfM;ks /kehZ rRo ds gkWQ ykbQ vkSj ehu

ykbQ ds chp laca/k dks crk,aA

Define half life period. Give the relationship between half life and mean life for a

radioactive element.

VI. nh?kZ mÙkjh; iz'u@Long Type Answer Questions

1. What do you mean by polarisation of light ? How can you obtain polarised light ? State

Brewster's law ?

2. What is oscillator circuit ? State positive & negative feedback of a transmitor ?

Draw oscillator circuit diagram ?

3. Explain the theory construction and working of a cyclo-tron ?

4. What are the laws of Proto Electric effect ? What is Einstein's theory to explain photo

Electric effect ?

5. Draw truth table Boolean expression and Logic Symbols for (a) NOT gate

(b) NOR gate (c) NAND gate ?

6. State atleast two differences between Potential differences and Electro-motive

force ? How can you use a potentiometer to compare of two primary cells ? Use a

proper circuit 1- diagram for it ?

7. i`"B&ruko ,oa :i'kh&dks.k dh ifjHkk"kk nsaA ds'kuyh esa æo ds p<+ko ds fy, O;atd izkIr

djsaA

What do you understand by Surface Tension and Angle of Contact ? Find an expression

15

for rise of liquid in a Capillary Tube.

8. :)ks"e ifjorZu D;k gS \ :)ks"e ifjorZu ds fy, lehdj.k PV = fu;rkad dks LFkkfir djsaA

What is Adiabatic Change ? For adiabatic change, establish the equation PV

= Constant.

9. irys ysal ds fy, lkfcr djsa 1

𝑓= − 1

2

1 1

R R1

For a thin lens prove that 1

𝑓= − 1

2

1 1

R R1

10. ,d o`````Ùkkdkj /kkjokgh dq.Myh ds v{k ij ds fdlh fcUnq ij pqEcdh;&{ks= dk

O;td izkIr djsaA

Find an expression for the magnetic field at a point on the axis of a circular coil

due to a current flowing in it.

11. foLdkflrk D;k gS \ foLdkflrk xq.kkad ds LVksd ds lw= dh O;k[;k djsaA LVksd ds lw=

dk iz;ksx dj ,d rjy inkFkZ dk foLdkflrk xq.kkad vki dSls Kkr dj ldrs gSa \

What is viscosity ? Explain Stoke's formula for coefficient of viscosity ? How

can you find coefficient of viscosity of a fluid using Stoke's formula ?

12. vizxkeh rjax D;k gS \ vizxkeh rjax ds nkSjku fufeZr uksM~~l vkSj ,fUV&uksM~l dk o.kZu

djsaA nks fujUrj uksM~~~~l ds chp nwjh D;k gS \

What is a stationary wave ? Describe nodes and anti-nodes formed by a

stationary wave. What is the distance between two consecutive nodes ?

13. ,d lkbDyksVªkWu ds fl)kar] cukoV vkSj dk;Ziz.kkyh dk o.kZu djsaA bldh de ls de

nks lhekvksa dks crk,aA

Describe the principle, construction and working of a cyclotron. State at least two

limitations.

14. ,d dkWeu bfeVj VªkaftLVj ,sefIyQk;j lfdZV cuk,aA buiqV vkSj vkmViqV ds chp

Qst vUrj D;k gS \ djsaV xsu] oksYVst xsu vkSj ikoj xsu dk vfHkO;atuk nsaA

16

Draw a common emitter transistor amplifier circuit. What is the phase difference

between input and output ? Give expression for current gain, voltage gain and

power gain.