TN 11th Question Paper 2025 Physics

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8417
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!8417IstYearPhysics!
PART - III
C¯Ø¤¯À / PHYSICS

( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

Põ» AÍÄ : 3.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 70
Time Allowed : 3.00 Hours ] [ Maximum Marks : 70

AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP¨ £vÁõQ EÒÍuõ GߣuøÚa
\›£õºzxU öPõÒÍÄ®. Aa_¨£vÂÀ SøÓ°¸¨¤ß, AøÓU
PsPõo¨£õÍ›h® EhÚi¯õPz öu›ÂUPÄ®.
(2) }»® AÀ»x P¸¨¦ ø©°øÚ ©mk÷© GÊxÁuØS®
AiU÷PõikÁuØS® £¯ß£kzu ÷Ásk®. £h[PÒ ÁøµÁuØS
ö£ß]À £¯ß£kzuÄ®.

Instructions : (1) Check the question paper for fairness of printing. If there is any lack of fairness,
inform the Hall Supervisor immediately.

(2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

£Sv – I / PART - I

SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 15x1=15
(ii) öPõkUP¨£mkÒÍ |õßS ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯
Âøhø¯z ÷uº¢öukzxU SÔ±mkhß Âøh°øÚ²® ÷\ºzx
GÊuÄ®.
Note : (i) Answer all the questions.
(ii) Choose the most appropriate answer from the given four alternatives and write
the option code and the corresponding answer.

[ v¸¨¦P / Turn over

8417 2

1. ^µõÚ {øÓ Ahºzv öPõsh vs©zusiØS ö\[SzuõPÄ® H÷uÝ® J¸
•øÚ°ß ÁÈ÷¯ ö\À¾® Aaø\¨ö£õ¸zu {ø»©z v¸¨¦zvÓß __________.

1 1
(A) I=MR2 (B) I = Ml
2
(C) I= 1 MR 2 (D) I = Ml 2
3
12 2

The moment of inertia of a uniform rod about an axis which is perpendicular to the rod and
touches any one end of the rod is ___________.

1 2 1 1
(a) I=MR2 (b) I= Ml (c) I= MR 2 (d) I = Ml 2
12 2 3

2. öP¨Í›ß Cµshõ® Âv¨£i, `›¯øÚ²® ÷PõøͲ® CønUS® Bµ öÁUhº
\©Põ» AÍÂÀ \©£µ¨¦PøÍ HØ£kzxQßÓÚ. CÆÂv¯õÚx __________ ©õÓõ
Âv¨£i Aø©¢xÒÍx.

(A) BØÓÀ (B) ÷|º÷Põmk E¢u®

(C) C¯UP BØÓÀ (D) ÷Põn E¢u®

According to Kepler’s Second Law, the radial vector to a Planet from the Sun sweeps out equal
areas in equal intervals of time. This law is a consequence of Conservation of __________.

(a) energy (b) linear momentum

(c) kinetic energy (d) angular momentum

3. RÌUPshÁØÖÒ Gx Aø»ø¯U SÔUQÓx ?

1
(A) (x + vt) (B) (x−vt)3 (C) sin(x+vt) (D) x(x+vt)

Which of the following represents a wave ?

1
(a) (x + vt) (b) (x−vt)3 (c) sin(x+vt) (d) x(x+vt)

A

3 8417

4. xPÒ JßÖ ^µõÚ Ámh C¯UPzvØS Em£kQÓx. ÷Põn E¢u® Gøu¨ ö£õ¸zx
©õÓõx ?
(A) Ámhzvß EÒ÷Í H÷uÝ® J¸ ¦ÒÎø¯
(B) Ámhzvß ø©¯zøu
(C) Ámhzvß öÁÎ÷¯ H÷uÝ® J¸ ¦ÒÎø¯
(D) Ámh¨£›v°À H÷uÝ® J¸ ¦ÒÎø¯
A particle undergoes uniform circular motion. The angular momentum of the particle remains
conserved about :
(a) any point inside the circle
(b) the centre point of the circle
(c) any point outside the circle
(d) the point on the circumference of the circle

5. ö£õ¸öÍõßÖ ©õÓõz vø\÷ÁPzvÀ ö\õµ ö\õµ¨£õÚ £µ¨¤À ö\À¾® ÷£õx
RÌUPshÁØÖÒ Gx \õzv¯® ?
(A) ö£õ¸Îß «x ¦ÓÂø\ ©mk® ö\¯À£kQÓx
(B) ö£õ¸Îß «uõÚ öuõS£¯ß Âø\ _È
(C) ö£õ¸Îß «x C¯UP Eµõ´Ä ©mk® ö\¯À£kQÓx
(D) ö£õ¸Îß «x Âø\ Hx® ö\¯À£hÂÀø»
When the object is moving at constant velocity on the rough surface :
(a) only external force acts on the object
(b) net force on the object is zero
(c) only kinetic friction acts on the object
(d) no force acts on the object

6. \õº»ì Âv°ß£i, £¸©ß ©ØÖ® öÁ¨£{ø»US©õÚ Áøµ£h® :
(A) J¸ ÷|ºU÷Põk (B) J¸ }ÒÁmh®
(C) J¸ £µÁøͯ® (D) J¸ Ámh®
The graph between Volume and Temperature in Charles’ law is :
(a) a straight line (b) an ellipse
(c) a parabola (d) a circle

A [ v¸¨¦P / Turn over

8417 4

7. |À¼¯À¦ Áõ² JßÖ \©{ø»°À EÒÍ ÷£õx ¤ßÁ¸® AÍÄPÎÀ Guß ©v¨¦
_ȯõS® ?
(A) \µõ\›z vø\÷ÁP® (B) rms ÷ÁP®
(C) ªPÄ® \õzv¯©õÚ ÷ÁP® (D) \µõ\› ÷ÁP®
A sample of ideal gas is at equilibrium. Which of the following quantity is zero ?
(a) average velocity (b) rms speed
(c) most probable speed (d) average speed

8. Sκ\õuÚ¨ö£mi JßÔß COP BÚx 4 BS®. 300 J öÁ¨£zøu Sκ\õuÚ¨
ö£mi°¼¸¢x öÁÎ÷¯ØÓ ÷Áskö©ÛÀ GÆÁÍÄ ÷Áø» ö\´¯¨£h
÷Ásk® ?
(A) 600 J (B) 66.67 J (C) 50 J (D) 75 J
A refrigerator has COP of 4. How much work must be supplied to the refrigerator in order
to remove 300 J of heat from its interior ?
(a) 600 J (b) 66.67 J (c) 50 J (d) 75 J

1
9. (µ0 ε0 )− 2 &ß £›©õnzøuU RÌPshÁØÖÒ Gx ö£ØÔ¸US® ?

(A) vø\÷ÁP® (B) }Í®
(C) Âø\ (D) Põ»®
−1 2
Which of the following has the dimension of (µ0 ε0 ) is :
(a) Velocity (b) Length
(c) Force (d) Time

10. J¸ uhPÍ Ãµº 25 m Bµ•øh¯ ÁmhÁiÁ Kk£õøu°À I¢x •øÓ _ØÔ
Á¸QÓõº. AÁº Ph¢u öuõø»Ä ©ØÖ® Aøh¢u Ch¨ö£¯ºa] :
(A) 785 m, _È (B) 942 m, _È
(C) 125 m, _È (D) _È, _È
An athlete covers 5 rounds on a circular track of radius 25 m. The total distance and
displacement travelled by him is :
(a) 785 m, zero (b) 942 m, zero
(c) 125 m, zero (d) zero, zero

A

5 8417

11. P®¤°ß öÁ¨£{ø» E¯ºzu¨£mhõÀ, Auß ¯[&SnP® :
(A) AvP AÍÄ E¯¸®
(B) ©õÓõx
(C) ªPU SøÓÁõÚ AÍÄ E¯¸®
(D) SøÓ²®
If the temperature of the wire is increased, then the Young’s Modulus will :

(a) increase rapidly

(b) remain the same

(c) increase by a very small amount

(d) decrease

12. \© {øÓ²ÒÍ C¸ ö£õ¸ÒPÒ m1 ©ØÖ® m2 J÷µ ÷|ºU÷PõmiÀ •øÓ÷¯ 5 ms−1
©ØÖ® −9 ms−1 GßÓ vø\÷ÁP[PÎÀ C¯[SQßÓÚ. ÷©õu»õÚx «m] ÷©õuÀ
GÛÀ, ÷©õu¾US¨¤ß m1 ©ØÖ® m2 ö£õ¸ÒPÎß vø\÷ÁP[PÒ •øÓ÷¯ :
(A) −9 ms−1 ©ØÖ® 5 ms−1 (B) −4 ms−1 ©ØÖ® 10 ms−1
(C) 5 ms−1 ©ØÖ® 1 ms−1 (D) 10 ms−1 ©ØÖ® 0 ms−1
Two equal masses m1 and m2 are moving along the same straight line with velocities 5 ms−1
and −9 ms−1 respectively. If the collision is elastic, then calculate the velocities after the
collision of m1 and m2 respectively.

(a) −9 ms−1 and 5 ms−1 (b) −4 ms−1 and 10 ms−1

(c) 5 ms−1 and 1 ms−1 (d) 10 ms−1 and 0 ms−1

13. RÌUPsh CønPÎÀ GøÁ Jzu £›©õnzøu ö£ØÖÒÍ C¯Ø¤¯À AÍÄPÒ ?
(A) v¸¨¦Âø\ ©ØÖ® vÓß (B) Âø\ ©ØÖ® vÓß
(C) Âø\ ©ØÖ® v¸¨¦Âø\ (D) v¸¨¦Âø\ ©ØÖ® BØÓÀ
Which of the following pairs of physical quantities have same dimensions ?

(a) torque and power (b) force and power

(c) force and torque (d) torque and energy

A [ v¸¨¦P / Turn over

8417 6

14. ÷PõÒ JßÔÀ 50 m E¯µzv¼¸¢x ö£õ¸öÍõßÖ R÷Ç ÂÊQÓx. Ax uøµø¯
Aøh¯ GkzxU öPõÒЮ ÷|µ® 2 ÂÚõi GÛÀ, ÷PõÎß Dº¨¦ •kUPzvß
©v¨¦ GßÚ ?
(A) g=15 ms−2 (B) g=20 ms−2 (C) g=30 ms−2 (D) g=25 ms−2
An object is dropped in a planet from height 50 m, it reaches the ground in 2 s. The
acceleration due to gravity in the planet is :

(a) g=15 ms−2 (b) g=20 ms−2 (c) g=30 ms−2 (d) g=25 ms−2

15. uÛ F\À JßÖ ªP AvP E¯µ® öPõsh PmihzvÀ öuõ[PÂh¨£mkÒÍ
÷£õx, ^›ø\ Aø» C¯ØÔø¯¨÷£õ» ußÛaø\¯õÚ •ßÝ® ¤ßÝ®
C¯UPzøu ÷©ØöPõÒQÓx. \©{ø»¨¦Òΰ¼¸¢x 4 m öuõø»ÂÀ, F\À
Ssiß •kUP©õÚx 16 ms−2 GÛÀ Auß Aø»Ä ÷|µ® :
(A) 2 πs (B) 2 s (C) πs (D) 1 s
A pendulum is hung in a very high building, oscillates to and fro motion freely like a simple
harmonic oscillator. If the acceleration of the bob is 16 ms−2 at a distance of 4 m from the
mean position, then the time period is :

(a) 2 πs (b) 2s (c) πs (d) 1s

£Sv – II / PART - II

SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 24 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x2=12

Note : Answer any six questions. Question No. 24 is Compulsory.

16. {³mhÛß CµshõÁx Âvø¯U TÖP.
State Newton’s Second Law.

17. PV Áøµ£h® GßÓõÀ GßÚ ?

What is a PV diagram ?

A

7 8417

→ ∧ ∧ → ∧ ∧
18. A = 5 i − 3 j , B = 4 i + 6 j öÁUhºPøÍ Cµsk £UP[PÍõPU öPõsh •U÷Põnzvß
£µ¨¤øÚU PnUQkP.
Calculate the area of a triangle for which two of its sides are given by the vectors

→ ∧ ∧ → ∧ ∧
A = 5 i − 3 j , B = 4 i +6 j

19. \µõ\› ÷©õu¼øhz yµzøu £õvUS® PõµoPÒ ¯õøÁ ?
What are the factors affecting the Mean Free Path ?

20. £›©õn •øÓ°À öPõkUP¨£mh C¯Ø¤¯À \©ß£õmøh \›¯õ GÚ ÷\õvUPÄ®.
v=u+at

Check the dimensional correctness of the given physical equation.

v=u+at

21. |øh•øÓ ÁõÌÂÀ v¸¨¦Âø\ £¯ß£kzu¨£k® GkzxUPõmkPÒ
CµsiøÚU TÖP.
Give any two examples of torque in day-to-day life.

22. JzuvºÄ ÂÍUSP. GkzxUPõmk u¸P.
Explain Resonance. Give an example.

23. Dº¨¦ ¦»® Áøµ¯ÖUPÄ® ©ØÖ® Auß A»QøÚz u¸P.
Define the Gravitational Field and give its unit.

24. Kº FhPzvÀ J¼°ß ÷ÁP® 900 ms−1. FhPzvÀ Kº ¦ÒΰÀ 2 {ªh[PÎÀ
PhUS® Aø»PÎß GsoUøP 3000 GÛÀ Aø»}ÍzøuU PõsP.
The speed of wave in a certain medium is 900 ms−1. If 3000 waves passes over a certain
point of the medium in 2 minutes, then compute its wavelength.

A [ v¸¨¦P / Turn over

8417 8

£Sv – III / PART - III

SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 33 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x3=18

Note : Answer any six questions. Question No. 33 is Compulsory.

25. öÁUhº ö£¸UP¼ß £s¦PøÍ GÊxP. (H÷uÝ® BÖ)
Write the properties of Vector Product. (Any six)

26. Áõ²UPÎß C¯UPÂ¯Ø öPõÒøPUPõÚ Gk÷PõÒPøÍ GÊxP.
Write down the postulates of Kinetic theory of Gases.

27. J¸ ö£mi 25 N Âø\°ÚõÀ 15 m Ch¨ö£¯ºa] HØ£k©õÖ CÊUP¨£kQÓx.
Âø\US®, Ch¨ö£¯ºa]US® Cøh÷¯ EÒÍ ÷Põn® 308 GÛÀ, Âø\°ÚõÀ
ö\´¯¨£mh ÷Áø»ø¯U PõsP.
A box is pulled with a force of 25 N to produce a displacement of 15 m. If the angle between
the force and displacement is 308, find the work done by the force.

28. ¦Â{ø»z xønU÷PõÒ ©ØÖ® x¸Áz xønU÷PõÒ – ]Ö SÔ¨¦ ÁøµP.
Write short notes on Geostationary Satellites and Polar Satellites.

29. öÁ¨£® £µÄ® öÁÆ÷ÁÖ ÁÈ•øÓPøÍ ÂÍUSP.
Explain various modes of heat transfer.

30. K´Ä{ø» Eµõ´Ä ©ØÖ® C¯UP Eµõ´Âß ]Ó¨¦U TÖPøÍ J¨¤kP.
Compare the salient features of Static and Kinetic Friction.

A

9 8417

31. JzuvºÄU PõØÖz u®£ P¸Â°À •øÚzv¸zu® GßÓõÀ GßÚ ?
What is meant by end correction in Resonance Air Column apparatus ?

32. v¸¨¦ Âø\US®, ÷Põn E¢uzvØS® Cøh÷¯¯õÚ öuõhº¦ ¯õx ?
What is the relation between Torque and Angular Momentum ?

33. 10 m }Í•ÒÍ J¸ P®¤¯õÚx 1.25×10 −4 m 2 SÖUS öÁmk¨£µ¨ø£U
öPõskÒÍx. Ax 5 kg £ÐÂØS Em£kzu¨£kQÓx. P®¤¨ö£õ¸Îß ¯[
SnP® 4×10 10 Nm −2 GÛÀ P®¤°À E¸ÁõÚ }m]ø¯U PnUQkP.
(g=10 ms−2 GÚU öPõÒP)
A wire 10 m long has a cross-sectional area 1.25×10−4 m2. It is subjected to a load of 5 kg.
If Young’s Modulus of the material is 4×1010 Nm−2, calculate the elongation produced in
the wire.

(Take g=10 ms−2)

£Sv – IV / PART - IV

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 5x5=25

Note : Answer all the questions.

34. (A) ¤øÇPÎß öÁÆ÷ÁÖ ÁøPPøÍ Â›ÁõP ÂÍUPÄ®.
AÀ»x
(B) PõØÔÀ J¼°ß vø\ ÷ÁPzvØPõÚ {³mhß \©ß£õmøh ÂÁ›UPÄ®
©ØÖ® »õ¨»êß v¸zuzøu ÂÍUPÄ®.
(a) Explain in detail the various types of errors.

OR

(b) Describe Newton’s formula for velocity of sound waves in air and explain the Laplace’s
correction.

A [ v¸¨¦P / Turn over

8417 10

35. (A) ÁøÍÄa \õø»PÎß öÁÎÂή¦ E¯ºzu¨£mi¸¨£uß ÷|õUP® GßÚ ?
ÂÍUSP.

AÀ»x

(B) £õìPÀ Âvø¯U TÖP. }›¯À yUQ°ß ö\¯À£õmøh ÂÍUSP.

(a) What is the need for banking of tracks ? Explain.

OR

(b) State Pascal’s law. Explain the working of Hydraulic lift.

36. (A) ø©¯ ÷|õUS •kUPzvØPõÚ ÷PõøÁø¯¨ ö£ÖP.

AÀ»x

(B) öÁ¨£ C¯¢vµzøu ÂÍUQ, Auß £¯ÝÖ vÓÝUPõÚU ÷PõøÁø¯¨ ö£ÖP.

(a) Derive the expression for Centripetal Acceleration.

OR

(b) Explain the heat engine and obtain its efficiency.

37. (A) _¸ÒÂÀ¼ß QøhzuÍ Aø»ÄPøÍ ÂÁ›.

AÀ»x

(B) \õ´uÍzvÀ E¸Ðuø» ÂÁ› ©ØÖ® Auß •kUPzvØPõÚ \©ß£õmøh
ö£ÖP.

(a) Describe the horizontal oscillations of a spring.

OR

(b) Describe rolling on inclined plane and arrive at the expression for the acceleration.

A

11 8417

38. (A) (i) vÓß – Áøµ¯ÖUPÄ®. vÓÛß H÷uÝ® Cµsk A»SPøÍ u¸P.
(ii) J¸ 75 W ªßÂ]Ô vÚ•® 8 ©o ÷|µ® J¸ ©õuzvØS (30 |õmPÒ)
£¯ß£kzu¨£mhõÀ ~Pµ¨£mh BØÓø» ªß A»QÀ PnUQkP.
AÀ»x
(B) (i) xønU÷PõÎß BØÓ¾UPõÚ ÷PõøÁø¯ u¸Â.
(ii) ¦Â°øÚa _ØÖ® {»Âß BØÓø»U PnUQkP.
(a) (i) Define Power. Give any two units of Power.
(ii) Calculate the energy consumed in electrical units when a 75 W fan is used for
8 hours daily for one month (30 days).

OR

(b) (i) Derive an expression for energy of satellite.
(ii) Calculate the energy of the Moon orbiting the Earth.

-oOo-

A [ v¸¨¦P / Turn over

Study Materials
Notes

Model Papers Class 6 Notes

Sample Papers Class 7 Notes
Half Yearly Sample Papers Class 8 Notes

Class 9 Notes
Important Resources
Class 10 Notes
Periodic Table
Class 11 Notes
Writing Skills / Formats

Maps of India / World Class 12 Notes

Books and Solutions

NCERT Books
NCERT Book Solutions
HC Verma Chapter Wise Solutions
RD Sharma Solutions
CGBSE Solutions