April 2013 - PHYSICS ^mcfw_VH$ cfw_dkmZ(312 Time 3 Hours...

PHYSICS
^m¡{VH$ {dkmZ
(312)
Time : 3 Hours ] [ Maximum Marks : 80
g_` :
3
K˚Q>o
] [
nyUm“H$ :
80
Note : (i) This Question Paper consists of two Sections, viz., ‘A’ and ‘B’.
(ii) All questions from Section ‘A’ are to be attempted. However, in some
questions, internal choice is given.
(iii) Section ‘B’ has two options. Candidates are required to attempt questions
from one option only.
(iv) Draw neat, clean and labelled diagrams, wherever necessary.
(v) Use log tables, if needed.
{ZX}e :
(i)
Bg ‡ Z-nà _| Xmo I˚S> h¢
—
I˚S> "A’ VWm I˚S> "~’ &
(ii)
I˚S> "A’ Ho$ g^r ‡ Z hb H$aZo h¢ & Hw$N> ‡ Zm| Ho$ A VJ'V {dH$ºn {XE JE h¢ &
(iii)
I˚S> "~’ _| Xmo {dH$ºn h¢ & narjm{W'`m| H$mo Ho$db EH$ {dH$ºn Ho$ hr ‡ Zm| Ho$ C˛ma XoZo h¢ &
(iv)
Ohm– Amd `H$ hmo, æn >, æd¿N> Am¡a Zm_m§{H$V AmaoI ~ZmBE &
(v)
`{X Amd `H$ hmo, Vmo bKwJUH$s` gma{U`m| H$m Cn`moJ {H$`m Om gH$Vm h¡ &
SECTION–A
I˚S>
–
A
1. When glass and copper pieces heated to the same temperature are touched,
copper piece seems warmer than glass piece. Explain why. 1
`{X Vm–~o VWm H$m–M Ho$ Xmo Qw>H$S>m| H$mo g_mZ Vmn VH$ J_' {H$`m Om`, Vmo Ny>Zo na Vm–~o H$m Qw>H$S>m H$m–M Ho$
Qw>H$S>o H$s VwbZm _| A{YH$ J_' bJVm h¡ & æn > H$s{O`o {H$ Eogm `m| hmoVm h¡ &
2. Name the source from which the earth receives ultraviolet radiations.
2

3. What is the name given to the light of a single wavelength?
4. Name the logic gate which performs (a) multiplication and (b) inversion
operation.
5. Write two points to distinguish between ‘mass’ and ‘weight’ of a body. 2
6. A concrete wall of thickness one metre of a dam can withstand a side pressure
of 10
5 2
N m
-
. Find the thickness of sidewall at the bottom of the water dam at
a depth of 100 m. [ g =
-
10
2
m s and density of water = 10
3
kg/m
3
2
m s
]
7. What is the numerical value of the specific heat of a gas in an (a) isothermal
process and (b) adiabatic process? Give reason for your answer. 2