Physics class 12th Question

x……®……ΔEÚ Roll No.




No. of Questions — 30 SS—40—PHY.
No. of Printed Pages — 11


=SS… ®……v™… ®…EÚ {…Æ˙“I……, 2013
SENIOR SECONDARY EXAMINATION, 2013
¶……Ë i…EÚ ¥…Y……x…
PHYSICS
1
∫…®…™… : 3 P…h]‰ı
4
{…⁄h……»EÚ : 56

{…Æ˙“I……Ãl…™…… E‰Ú ±…B ∫……®……x™… x…nÊ˘∂… :
GENERAL INSTRUCTIONS TO THE EXAMINEES :
1. {…Æ˙“I……l…‘ ∫…¥…«|…l…®… +{…x…‰ |…∂x… {…j… {…Æ˙ x……®……ΔEÚ + x…¥……™…«i…: ±…J…Â*
Candidate must write first his / her Roll No. on the question
paper compulsorily.
2. ∫…¶…“ |…∂x… EÚÆ˙x…‰ + x…¥……™…« ΩÈ˛*
All the questions are compulsory.
3. |…i™…‰EÚ |…∂x… EÚ… =k…Æ˙ n˘“ M…<« =k…Æ˙-{…÷Œ∫i…EÚ… ®…Â Ω˛“ ±…J…Â*
Write the answer to each question in the given answer-book
only.
4. V…x… |…∂x…… ®… +…xi… Æ˙EÚ J…hb˜ ΩÈ˛, =x… ∫…¶…“ E‰Ú =k…Æ˙ BEÚ ∫……l… Ω˛“ ±…J…Â*
For questions having more than one part, the answers to those
parts are to be written together in continuity.
5. |…∂x… {…j… E‰Ú Ω˛xn˘“ ¥… +ΔO…‰V…“ ∞¸{……xi…Æ˙ ®… EÚ∫…“ |…EÚ…Æ˙ EÚ“ j…÷ ]ı / +xi…Æ˙ /
¥…Æ˙…‰v……¶……∫… Ω˛…‰x…‰ {…Æ˙ Ω˛xn˘“ ¶……π…… E‰Ú |…∂x… EÚ…‰ ∫…Ω˛“ ®……x…Â*
If there is any error / difference / contradiction in Hindi &
English versions of the question paper, the question of Hindi
version should be treated valid.
SS—40—Phy. SS–580 [ Turn over

, 2
6. |…∂x… ∫…ΔJ™…… +ΔEÚ |…i™…‰EÚ |…∂x…
1 – 13 1
14 – 24 2
25 – 27 3
28 – 30 4
Q. Nos. Marks per question
1 – 13 1
14 – 24 2
25 – 27 3
28 – 30 4
7. |…∂x… ∫…ΔJ™…… 21 i…l…… 27 ∫…‰ 30 ®… +…xi… Æ˙EÚ ¥…EÚ±{… ΩÈ˛*
There are internal choices in Q. Nos. 21 and 27 to 30.

8. {…Æ˙“I…… ®… EËÚ±…E÷Ú±…‰]ıÆ˙ E‰Ú ={…™……‰M… EÚ“ +x…÷®… i… x…Ω˛” Ω˲*
Use of calculator is not allowed in the examination.

1. ¥…t÷i… I…‰j… Ɖ˙J……+… E‰Ú EÚ…‰<« n˘…‰ M…÷h… ±… J…B*
Write any two properties of electric field lines. 1
2. ∫…®… ¥…¶…¥… {…fiπ`ˆ EÚ…‰ {… Æ˙¶…… π…i… EÚ“ V…B*
Define equipotential surface. 1
3. X = 4Ω B¥…Δ Y = 48 × 10−8 Ω -m E‰Ú S……±…EÚ…Â EÚ“ ±…®§……<« +…v…“ EÚÆ˙x…‰ {…Æ˙ X ¥… Y E‰Ú
±…B ∫…ΔM…i… ®……x… ±… J…B*
Write the corresponding values of X and Y for which the lengths of
conductors X = 4Ω and Y = 48 × 10 −8 Ω -m are reduced to half. 1
4. n˘B M…™…‰ S…j…… ®… §…xn÷ P {…Æ˙ =i{…z… S…÷®§…EÚ“™… I…‰j… EÚ“ n˘∂…… ⊗ ¥… ☼ E‰Ú ∞¸{… ®… ±… J…B*




S…j… A S…j… B
SS—40—Phy. SS–580

, 3
In given diagrams write the direction of magnetic field produced at
point P in form of ⊗ and ☼. 1




Fig. A Fig. B
5. °ËÚÆ˙…b‰˜ EÚ… ¥…Ët÷i…S…÷®§…EÚ“™… |…‰Æ˙h… EÚ… x…™…®… ±… J…B*
Write Faraday's law of electromagnetic induction. 1
6. EÚ∫…“ |…i™……¥…i…‘ {… Æ˙{…l… ®… +…Æ˙…‰ {…i… ¥……‰±]ıi…… 220V Ω˲* ™… n˘ R = 8Ω, X L = X C = 6Ω Ω˲
i……‰ x…®x… EÚ… ®……x… ±… J…B :
a) ¥……‰±]ıi…… EÚ… ¥…M…« ®……v™… ®…⁄±… ( rms ) ®……x…
b) {… Æ˙{…l… EÚ“ |… i…§……v……*
In an alternating circuit applied voltage is 220V. If R = 8Ω,
X L = X C = 6Ω then write the values of the following : 1
a) Root mean square value of voltage
b) Impedance of circuit.
7. a) S…÷®§…EÚi¥… E‰Ú ±…B M……>∫… x…™…®… EÚ…‰ ®…ËC∫…¥…‰±… ∫…®…“EÚÆ˙h… E‰Ú ∞¸{… ®… ±… J…B*
1
b) EÚ… ®……x… ±… J…B*
μ0ε0
a) Write Gauss' law for magnetism in the form of Maxwell equation.
1
b) Write the value of . 1
μ0ε0

8. +À§…n÷˘EÚi…… n˘…‰π… EÚ…‰ ∫…Δ∂……‰ v…i… EÚÆ˙x…‰ E‰Ú ±…™…‰ EÚ∫… |…EÚ…Æ˙ E‰Ú ±…Â∫… EÚ… |…™……‰M… EÚÆ˙i…‰ ΩÈ˛ ?
Which type of lens is used to correct astigmatism ? 1
9. {…⁄h…« +…xi… Æ˙EÚ {…Æ˙…¥…i…«x… EÚ“ P…]ıx…… EÚ…‰ {… Æ˙¶…… π…i… EÚ“ V…B*
Define the phenomenon of total internal reflection. 1
10. EÚ…‰<« i…i¥… A x…®x… n˘…‰ S…Æ˙h… |… GÚ™……+… u˘…Æ˙… i…i¥… C ®… ¥…P… ]ıi… Ω˛…‰i…… Ω˲ :
A ⎯⎯→ 2He4 + B

B ⎯⎯→ 2 ( −1e 0 ) + C

i…i¥……Â A, B ¥… C ®…Â ∫…‰ ∫…®…∫l…… x…EÚ ™…÷M®… UÙ…Δ ]ıB*
SS—40—Phy. SS–580 [ Turn over

, 4
An element A decays into element C by the following two step
processes :
A ⎯⎯→ 2He4 + B

B ⎯⎯→ 2 ( −1e 0 ) + C
Select pair for isobars from elements A, B and C. 1
11.
A B Y Y'
0 0 0 1
0 1 1 0
1 0 1 0
S…j… : P
1 1 1 0
∫……Æ˙h…“ : Q
S…j… P B¥…Δ ∫……Æ˙h…“ Q ∫…‰ ∫…Δ§…Δ v…i… i……ÃEÚEÚ u˘…Æ˙…Â E‰Ú x……®… ±… J…B*
A B Y Y'
0 0 0 1
0 1 1 0
1 0 1 0
Figure : P
1 1 1 0
Table : Q
Write the names of logic gates related to figure P and table Q. 1
12. {…fil¥…“ ∫…i…Ω˛ ∫…‰ |…‰π…h… B¥…Δ + ¶…O……Ω˛“ BÂ]ı“x…… EÚ“ >ƒS……<™……ƒ GÚ®…∂…: hT ¥… hR ΩÈ˛* n˘…‰x…… BÂ]ı“x……+…Â
E‰Ú §…“S… EÚ“ + v…EÚi…®… o˘Œπ]ıƉ˙J…“™… n⁄˘Æ˙“ (LOS) E‰Ú ±…B ∫…Δ§…Δv… ±… J…B*
Heights of transmitting and receiving antennas from earth surface are
hT and h R respectively. Write the relation for maximum line-of-sight
(LOS) distance between two antennas. 1
13. ®……Ïb÷˜±…x… C™…… Ω˲ ? +…™……®… ®……Ïb÷˜ ±…i… i…ÆΔ˙M… E‰Ú ∫…Δ∫…⁄S…x…Ú E‰Ú ±…B |…n˘k… + ¶…O……Ω˛“ §±……ÏEÚ-+…Ɖ˙J…
®…Â ¶……M… X EÚ… x……®… ±… J…B*




SS—40—Phy. SS–580