SPACE FOR ROUGH WORK. English disintegration of 450 nuclei is. 18. In the combination of the following gates the. ollE{l
a
l.
A carbon resistor of(47
t
'ulll;i'
B
fs
with rings of diiTerent colours for identification. The colour code sequence
(1)
its
directed electric field E The direction of electric freld is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest in it it ro,lgh th" same vertical distance h' The time of electron, in comparison tn the time of iuff
will be
- Yellow - Orange - Silver Yellow - Violet - Orange - Silver uw$ (3\ Yellow - Green - Violet - Gold (4) Green - Orange - Violet - Gold Violet
"itft" Proton fall ofthe
consists of a variable number tr' of identical cells Gaving internal resistance 'r' each) which are connected in series 'The terminals of the battery are short-circuited and b. iv6i"h of trr" gtuprr"
A battery
2.
correct relationship between I and n
s
tf
An electron falls from rest through a vertical distance h in a uniform and vertically upward
4'7) kA is to be marked 4.
J (/ smaller I \,/ (2) 5 times great€r "f (3) 10 times greater (4) equal
t O
?
--+n
Q) --+n
A
6
t O I
(4)
t
.
--+n
(1) zn6
2_
19ns (3) 2a
O --rn 3.
pendulum
is hung from the roof of
a
sulficiently high building and is moving freely to and fro like a simple harmonic oscillator' Ttre acceleration of the bob of the pendulum is 2O mls2 at a distance of 5 m from the mean position. The time period of oscillation is
I (3)
t
(1) 330 m/s (2) 339 m/s (3) S5O m/s (4) 300 m/s
I
o
I
A tuning fork is used to produce resonance in a glass tube. The length of the air mlumn in this lube can be adjusted by a variable piston' At room temperatu re of 27"C two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency o115s tr"ning fork is 320 Hz, the velocity of souad in air at 27'C is
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I
t.
(4) ls
4" ola
r ,d. Tlt T
az
tI'x
s
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T b!". 19v .? 4p
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A set of 'n' equal resistors, o,[ value B each, are plates 7. . The electrostatic force between the metal cop4elt -ed in series t4 .a batt€ry of emf E an-d a having C of an isolated parallel plate capaqpJ ( internai resistance !li. fire currrint drawn is I' 'e."a area A, is '\( between the "ir.g"independent of the distance Now, the h'resistori are qounected in parallel to JD/ fr.om the same battery. Then the current ilrawn n; $,,/ .vtates. rn is bf talue battery becomes 10 I. the Iinearly prbportional to tlre distance
(1) 10 (2) 11 (3) 20 (4) I
AcHLA/DD/Pas€z
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Y-,o" st\
gq" :L' vzify,t 6'" 6?-
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--
2 ?du U .ri
f !! hQ =
n
V- nr
(oR.
E-
u -.
NR
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vo
I
e)
(3)
between the Plates'
proportional
to the
square root
of
the
ilistance between t'he Plates'
a\ r
(4)
inversely proportional
to the
distance
between the Plates.
SP AC
,/ zI
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n1
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.rf
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t0K
u)9 F-
ny' "lgy h
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n
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English
..i" ,t' \,,
I
8.
An electron of mass m with an initial velocity
12. In
the circuit shown in the figure, the input voltage V; is 20 V, VsB = 0 and Vcp = 0. The
i (V0 > 0) enters an electric field E =-Eoi (E0=constant>0)att=0. If \is its de-Broglie wavelength initially, then its V
= V0
values of Ig, Ig and P are given by
.
20v.
de-Broglie wavelength at time t is
l.s
(1)
l*
(D
RC
l.o
"Eo
mvo
1*
vt
"Eo
sq"-u^.: ( u. g-t : =
10 30
(4)
2:- 1 1:- 2
^"r" :,j4\
IB
(3)
IB=20FA" Ic=
10
mr{,
=25p4 Ic=5mrl, 5
f;F, -' t*'1.4j' 5-r -. -'1fld
F = 25o
9=2OO
mA, P=250 F = 125
f
.' dxt;e
t\ ,5't
B
Y
f;,=f' ';
iE
*s
'* )
6aailS9 '6@ ) toor lgo . lo to.
(1)
A B
Q)
e.S+A.S
\x{) A.B +A.B (4)
The ratio of kinetic ener$/ to the total energy of an electron in a Bohr orbit of the hydrogen atom, ,s (1) 1:1 (3)
e\
Ic =
A
15
\91 1:- 1
IB = 40
combination of the following gates the ollE{llcan. te written in terms of inputs A ind Bas
5.5u"
-.s; radioactive material, half-life
20
tti'
(1)
'y 18. In the
lQginutes. If initially there are 600 number of urrclei, the time tsken (in minutes) -for the Ce)1 .lo disintegration of 450 nuclei is
11.
E B-?-t-(
Is =a0 p,A, Ic = 5 mAr
hrrzlmv'A (v-;;2vo-uo=u' Vir'- 3'
;,; t
(B) 4: L
/) (2) (3) . (4)
--
Iq: -t9rroil
ul*l t:2 (2) l:4 10. For a
B
e v:l\,
When the light of frequency 2vs (where vs is tbreshold frequency), is itrcident on a metal plate, the nq*irntrm vslocitl' of electrons emittcd is v1. When the frequency of tlre incident radiation is increased'to 5vg, the maximun velocity of electrons emitted from the same plate E' hv r !S is ve. The ratio of 11t'o12 is
i;;
ko
t
(3) \t (4) r0
9.
d
'r'[L ' Earth would deciease. on the Earth will not
SPACE FOR ROT'GH WORK
4,{t
.
IS
F
ACHLL/DD/Page 7
t *-r,l
y" \-J, +- {ttnvifurlo) il6. ff the mass of the Sun wer€ ten times smsller
cross-sectional area_.3A. If the length of the first wire is increased by Al on applying a force F,
o11
to (3) 10:7 Fr'(4) 2:5
,.*6
Tho wbes are made of the same materiel a.ud . The first wire has have the same vol
' o; gr At'tr'i-'lu \rs 6F Alt =gAt' (3) 4F !tly =t
energy (I!) as well as rbtational kinetic energr * (Kr) simultaneously. Th.e ratio IQ : 0! + \) for I t.w '-r ! ,-' ' is the enhere 'z , , !* axto? -! rt Ro*-. 2' T .-n L 1 (2) 6:7
,
g i
|?
\/u Rorr:l+ E rn'.zlndbh E !+ !SrnCttcv ) l-( *4 e f+t 13r 7 *a'+ Yl
z-\
r'
!
S i.t
l.L
+
46.
Which of the following is an amino acid derived hormone
47.
Epinephrine
(2)
Ecdysone
(3)
Estradiol
(4)
Estriol
(3)
(4)
_
Medulla oblongata
Limbic system
:
consists of fibre
tracts that interconnect different t'egions of brain; controls movement. Hypothalamus
Corpus callosum
production of releasing hormones and regulation of temperature, hunger and thirst. band offibers counecting Ieft and right cerebral hemispheres.
ligameaas aftached to the ciliary body
ligaments attached to the iris smooth mwcles attached to the
(1) '(2\ \rtb (4) 52,
foogesterone and Aldosterone
tstrogen
a-nd
Parathyroid hormone
Parathyroid hormone and Prclactin
ACHLA/DD/Page 8
Reptilia Aves Osteichthyes
Diatoms Cyanobacteria Euglenoids
homeotherm
(1) uEl (3) (4) 54.
,.fr
(2) (3) (4)
55.
a
?
Macropus
cheton" Camclus
Psittarula
Which of the following animals does.zot undergo metamorphosis ?
Earthworm, Tunicate.. Moth Starfish
Which of the follorring featuips is useil to identi& a male cockroach from a female ipckroach ?
,aO
Aldostei'one and Prolactin
Amphibia
Which .one of these animals is zol
53.
iris'
?
animals
Which of the following organisms are known as chief producers in the oceans ? (1) Dinoflagellates
vl2) (3) (4)
smooth muscleg attached to the ciliary body
significant role in ost€oporosis
9(d (4)
having a contractile vacuble for removing excess water using pseudopodia for capturing prey
characterized by crop and gizzard in its digestive system.
controls respiration and cardiovascular reflexes.
Which of the following hormones can play a
(1) (2)
using flagella for locomotion
,/l
