Š¹ãûàãìa îåæwt a¹ìt òì ë lüv¹ šy òà à òú ú lüv¹ šìy

š¹ãÛà=¢ãìA Îå[>[ÆWt A¹ìt Òì¤ ë™> lüv¹ šy ®òà \ >à ÒÚ ú
lüv¹ šìy "šøìÚà \ >ãÚ [WÒû ëƒ*Úà Wºì¤ >à ú š¹ãÛà šå[ÑzAà
* lüv¹ šìy¹ [>[ƒ¢Ê Ñ ‚à> [®Ä "๠ëAà=à* yû[³A >} [ºJì¤
>à ú
8.
Î}ìÅà‹ì>¹ \ >¸ lüv¹ šìy ëAàì>à šøA๠Îàƒà Aà[º ¤à t¹º
¤¸¤Ò๠A¹à Wºì¤ >à ú
In case of any ambiguity in translation of any question, English version shall be treated as final.
ëAàì>à šøÅ¥ [¤ÈìÚ ">å¤ à샹 [¤°à[”z =àAìº, Òü}ì¹[ \ šøÅ¥ Wè Ølà”z ¤ìº ³à>ìt Òì¤ ú
Name of the Candidate (in Capitals) : _____________________________________________________________________
Roll Number : in figures ________________________________________________________________________________
: in words _________________________________________________________________________________
Centre of Examination (in Capitals) : _____________________________________________________________________
Candidate’s Signature : ____ ___________ __________ Invigilator’s Signature : _____ ____________________________
Facsimile signature stamp of
Centre Superintendent : _________________________________________________________________________________
*0WW*
ALHCA
(English/Bengali)

ALHCA/WW/Page 2
SPACE FOR ROUGH WORK English/Bengali
1. The efficiency of an ideal heat engine working
between the freezing point and boiling point of
water, is
(1) 26·8%
(2) 6·25%
(3) 20%
(4) 12·5%
2. At what temperature will the rms speed of
oxygen molecules become just sufficient for
escaping from the Earth’s atmosphere ?
(Given :
Mass of oxygen molecule (m) = 2·76  10
– 26
kg
Boltzmann’s constant k
B
= 1·38  10
– 23
J K
– 1
)
(1) 2·508  10
4
K
(2) 5·016  10
4
K
(3) 8·360  10
4
K
(4) 1·254  10
4
K
3. The fundamental frequency in an open organ
pipe is equal to the third harmonic of a closed
organ pipe. If the length of the closed organ pipe
is 20 cm, the length of the open organ pipe is
(1) 13·2 cm
(2) 12·5 cm
(3) 8 cm
(4) 16 cm
4. The volume (V) of a monatomic gas varies with
its temperature (T), as shown in the graph. The
ratio of work done by the gas, to the heat
absorbed by it, when it undergoes a change from
state A to state B, is
(1)
5
2
(2)
3
1
(3)
3
2
(4)
7
2
1.
&A[i "àƒÅ¢ tàšãÚ Òü[gì>¹ lüZW "à‹à¹ * [>´•
"à‹àì¹¹ tàš³àyà \[>t Ñ£åi>à}A * Òã³à}ìA¹ γà>
Òìº Òü[g>[i¹ Û³tà
(1) 26·8%
(2) 6·25%
(3) 20%
(4) 12·5%
2.
ìAà> tàš³àyàÚ "[Gì \> "oå¹ ¤K¢- ³à‹¸ -³èº
(rms)
K[tì¤K šõ=ã[¤¹ ¤àÚ å³r캹 ³å[vû ë¤ìK¹ [kA γà>
Òì¤
?
(šøƒt "àìá
:
"[Gì\> "o å¹ ®¹
(m) = 2·76  10
– 26
kg
ì¤àÂi\ ô³¸àì>¹ ‹øç¤A
k
B
= 1·38  10
– 23
J K
– 1
)
(1) 2·508  10
4
K
(2) 5·016  10
4
K
(3) 8·360  10
4
K
(4) 1·254  10
4
K
3.
&A[i ³åJ ëJàºà "¹K¸à> >캹 ³èºÎåì¹¹ AÚà}A "š¹
&A[i ¤Þê ³åJ "¹K¸à> >캹 tõtãÚ lüšÎåì¹¹
AÚà}ìA¹ γà> ú ™[ƒ ¤Þê³åJ "¹K¸à> >캹 íƒQ¸¢
20 cm
ÒÚ tì¤ ëJàºà "¹K¸à> >캹 íƒQ¸¢ Òì¤
(1) 13·2 cm
(2) 12·5 cm
(3) 8 cm
(4) 16 cm
4.
&A[i š¹³àoåA K¸àìι tàš³àyà¹
(T)
ÎìU
"àÚt>
(V)
[>´• ¤[o¢t ëºJ[Wy ">åÎàì¹ š[¹¤[v¢t
ÒÚ ú K¸àÎ[i¹
A
"¤Ñ‚à ë=ìA
B
"¤Ñ‚àÚ š[¹¤¹[v¢t
Òìº K¸àÎ A[v¢A AõtAà ™¢ * KõÒãt tàìš¹ ">åšàt
(1)
5
2
(2)
3
1
(3)
3
2
(4)
7
2

ALHCA/WW/Page 3
SPACE FOR ROUGH WORK English/Bengali
5. A battery consists of a variable number ‘n’ of
identical cells (having internal resistance ‘r’
each) which are connected in series. The
terminals of the battery are short-circuited and
the current I is measured. Which of the graphs
shows the correct relationship between I and n ?
6. A carbon resistor of (47  4·7) k  is to be marked
with rings of different colours for its
identification. The colour code sequence will be
(1) Violet – Yellow – Orange – Silver
(2) Yellow – Green – Violet – Gold
(3) Yellow – Violet – Orange – Silver
(4) Green – Orange – Violet – Gold
7. A set of ‘n’ equal resistors, of value ‘R’ each, are
connected in series to a battery of emf ‘E’ and
internal resistance ‘R’. The current drawn is I.
Now, the ‘n’ resistors are