2nd puc physicsjan 2016.pdf
TRANSCRIPT
-
8/20/2019 2nd PUC PhysicsJan 2016.pdf
1/2
SECOhID
PUC
PREPAR.ATORY
EXAMINATION
-20,6
Time:
3-15
hours
No.of
Pages:
o2
PHYSICS
-(3S)
Max
Marks:7o
No.of
Ques.:37
otal
General
Instructions
:
1]All
parts
are
comPulsory.
2]Answers
without
ieleyant
diagramlfigurei
circuit
wherevernecessarywiiinotcarryany
marks.
3]
Direct
answers
to the
numerical
problems
r,vithout
detailed
solutions
witrl
not cany
any
marks'
PART.A
Answer
ALL
the
following
questions
:
1)
Define
linear
densitY
of
charge.
2)
Write
the
SI
unit of
current
density.
3
)
What
happens
to the
self
inductance
of
a
coil
if
a
soft iron
rod
is inserted
into
the
coil
?
4)
Define
magnetic
PermeabiiitY'
5)
What
is the
significance
of
Lenz's
lau''
6)
Holv
can the
resolving
power of
a
telescope
be
increased?
7)
Who
discovered
radio activity?
8)
ExPandLED.
9)
Drau.'the
sYrnbol
of
aNAND
gate
'
10)
Give
the
value
of
the
signal
banclwidth
of a
co-axial
cable
.
PART-B
---
---AmsTyeF.a*y-s'IvE
of
the following
questions:
5x2:10
.W
Write
Coulomb's
lar,v in
vector form
and
explain
the
terms
.
)q
Draw
graphs showingthe
variation
ofresistivity
of semicottductor
and
metailic
conductor
with
absolute
temperature
.
W
Mention
two sources
of
energy
ioss
in a
transfonner.
L4)
Give
two
uses
of
infi'ared radiations
.
t5)
Explain
Huygen's
principle
ofsecondarywavelets.
16)
What
are
the observations
of
Rutherford's
cr
-scattering experiment?
17)
Twonucleihavemassnumbers
in theratroS:27.
What
is the ratio of their
nuclear radii?
LD
Draw
the
block
diagram
of a
generalized communication systerl
.
PART.C
Anslver any
FIVE
of the
following
questions
:
5x3=15
)S)
Obtain an expression
for
the
effective capacitance
when two capacitors
are
connected
in
series.
20)
Arrive at an expression
forthe
magnetic
dipole moment
of
a revolving
electron in
terms
of
its
angular
momentum.
?l)
Distinguish between
diamagnetic
and
ferromagnetic
materials.
22)
Derive an expression
for
the
torque experienced
by a
magnetic dipole
rvhen
placed
in an external magnetic
field.
23)
Show that the
radius of curvature of
a
concave
rnirror
is equal to
twice
its
focal length.
l0x1:10
For More Question Papers Visit - www.pediawikiblog.com
For More Question Papers Visit - www.pediawikiblog.com
http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/
-
8/20/2019 2nd PUC PhysicsJan 2016.pdf
2/2
..
-/
U)
obtain
a relation
betr.veen
decay
constant
and
half
life
of
a radioactive
silmple
26)
Explaintheworking
ofa
zenerdiode
as
avortageregulator
PART:D
[V
dnswer
any TW_Osf
the
following
questions
.
2x5:10
Zn
Cbtain
the
expression
for
the
electric
field
at
apoint
on the
axial
line
of
an
electric
dipole.
28)
Derive
a
reration
betiveen
current
and
drift
velocity
.
29)
obtain
the expression
for
torque
acting
on
a
rectangular
current
loop
with
its
axis
perpendicularto
the
magnetic
field.
Answer
any
TWO
of
the
following
questions
:
2x5:10
30)
Usingphasor
diagram
obtain
expressions
forthe
impedance
and
current
in
a
series
LCR
circuit.
3
1)
Derive
an
expression
for
the
refractive
index
of
a
prisrn
in
terms
of
the
angle
ofthe
prism
and
the
angle
ofminimum
deviation.
32)
Explain
the
working
of
a
transistor
as
a switch.
Answer
any
THREE
of the
following
questions
:
3x5:15
33)
ABCD
is
a
square
ofside
0.Zm.Foint
charges
ofrnagnitudes
6nC,
l2nC
and
24nC
are
placed
at
the
corners
A,
B
and
C respectively.
Calculate
the potential
difference
between
D
and
the
centre
of the
square.
34)
A
uniform
wire
of
resistance
124
is
cut
into
three
pieces
in
the
rutio
l:2:3
and
the pieces
are
connected
to
form
a
triangle.
A cell
of
emf
gv
and
internal
resistance
l(-i
is
connected
across
the
highest
of
the
three
resistors.
calculate
the
current
in
each
branch
of
the
circuit.
35)
A rectangular
current
loop
of
sides
9cm
and
3cm
with
a
small
cut
is
moving
out
of
a
region
of
uniform
magnetic
field
opfmagnitude
0.3T
directed
normai
to
the
loop'
What
is
the
voltage
developed
across
the
cut
if
velocity
of
the
loop
is
10-2ms'r
in
a
direction
normal
to
the
(i)
longer
side
(ii)
shorter
side
of
the
loop?
For
how
rong
does
the
induced
voltage
rast
in
each
case?
3
6)
Two
narrow
slits
in
Young's
double
slit
experiment
are
0.
1gm
apart.when
they
are
illuminated
by
a
monochromotic
light
fringes
ofwidth
2.7
mmare
obtained
on
a
screen
0'8m
away'
Find
the
wavelength
of
light
used.If
the
source
is
replaced.
by another
source
of
waverength
450nm
find
the
change
in
the
fringe
width.
37)
For
a
metal
the
minimum
frequency
of the
incident
radiation
required
for
photo
emission
is
1.5xr015H2.
Find
its
r.vork
function.
rf
radiation
of
frequency
2
x
10l5IIz
is
incident
on the
metal
surface
find
the
maximum
kinetic
energy
of
the
emitted
photoelectrons
.
(Planek's
constant
:6.625
x
l0'3a
JS
and speed
of
light
in
vacuum is
3x108ms-r).
r.'I
r*t*il€