Assam Board Class 11 Question Paper 2022 Physics

ASSAM BOARD

QUESTION
PAPER
CLASS 11

Total No. of Printed Pages-12

22E-PHYS

2022

PHYSICSS

(Theory )

Full Marks: 70
Pass Marks: 21

Time 3 hours
The figures in the margin indicate full marks for the questions

ALLOTMENT OF MARKS

Q. No. 1 carries I mark each 1x8 8

Q. No. 2 carries 2 marks each 2x12 24

Q. No. 3 carries 3 marks each 3x6 18

Q. No. 4 carries 5 marks each 5x4 20

Total 70

/116 Contd.

2)
1. Answer any 1x8-8
eight of the following questions

a) Name the person who arrived at the correct nouo of
force in his famous laws of motion.

(b) Which of gravitational force and weak nuclear e is
relatively more strong?

If z ABl/3
Write the expression for relative
c3p3/2
AZ
error
Z

c3p3/2ICM 2

(d) Write the magnitude of the resultant of the unit vectors
j and k.

(e) Which of a javelin and a rocket is not an example of
projectile?

Except temperature, what is proportional to the
coefficient of linear expansion?

3)

a) Write the relation involving o, k and m of an oscillating
body.

(h) What is the type of ultrasonic wave produced b y a
Galton whistle?

How does viscosity of a liquid change with
temperature?

At which position is velocity of a particle in simple
harmonic motion maximum?

2. (a) Check the following equation dimensionally 2

P F.D
OR/ye
State the number of significant figures in the
the
following 1+1-2

(9 0-009m2

ii) 0.2560 g cms

/116 Contd.

4)

(b) If the rate of increase in velocity of a body is 4 ms
what will be its retardation? Are the average speed and
instantaneous speed same? 1+1-2

OR / r 7

A ball is thrown upward with an initial speed of
30 ms, What is the direction of acceleration during
the upward motion of the ball? What are its velocity
and acceleration at the highest point of its motion?
1+%t=2

30 msl A1 9RTA AITOT T7 COTA

(c) If Á and B are two vectors making an angle between
them, write the expression for their resultant vector.
What are the methods of vector addition? 1+a+=2

OR/7

A body is executing a uniform circular motion. Mention
1+1-2
any two properties of this motion.

(d) Express force as the ratio of power and velocity.

5

OR/y
Define elastic and inelastic
collision. 1+1-2

le) If the momentum of a
body is given by the
expression, ind the force acting on the body atfollowing
t 5s:=
22

z A1t= 5 sT fAA 1
P (20i +5t) kg ms
OR/79
Mention two
examples where we practically use
torque.
1+1-2

( What is geostationary
satellite? 2

OR/7
What is weightlessness? Can it be
experience on the earth?
possible to have its
2

g) Explain in brief why the raindrops are
shape. spherical in
2

OR/73
Which of liquid
drop and bubble has more excess
pressure and why?
1+1-2

Contd.

6)
T h e specific heat capacity of water is 4186 J kg KK-1
What do you mean by this
statement?
TA4 TCf%a uenfke 4 186Jkg IK-I qN144 141 1

OR/91
A sphere
of aluminium of mass 0.047 kg at 100 "
dropped in water and the temperature of water rises
up to 23 °C. If the specific heat
capacity of aluminium
is 0.911kJ kg"l K", then calculate the heat lost by the
sphere. 2
100 °CNUT Q1 0:047 kg 1 afAAITATA CST7 TO
COTTuIE A 23 °C ta gTAI
4aTAA
TC91 AAET 0.911 kJ kg"K* a, (TR (ATCOTa 45

State the zeroth law of thermodynamics. Draw a neat
diagram in support of the statement of the law.
1%+h=2

OR/7
State the first law of thermodynamics. Does it obey the
general law of conservation of energy? 1+1-2

0)Define mean free path of an enclosed gas. Mention two
factors on which mean free path depends. 1+(%+s)-2

7)
OR/Y7

The r.m.s. speed of nitrogen molecule is 490 ms at
273 K. Calculate the r.m.s.
speed of hydrogen molecule
at the same temperature. 2
273 K NOE ARUT F 71t7 C1 490 m s , 4

(k) Define amplitude or frequency of an oscillatory motion
and give its unit. 1+1=2

OR/T9
Mention one example each of free and forced
oscillation. Which of the following represents SHM if
a and x stand for acceleration and displacement
respectively? (a+a)+1-2

() a =0.7x
ti) a = -200x2

(ii) a = -10x

(iv) a =100x3

Calculate the amplitude and angular frequency of the
following travelling wave in SI units 1+1=2

ylx 9 =0.003 sin (50x -29

/116 Contd.

8)

OR / 7
a maSS of
072 m has
steel wire of length on it, then
A
tension of 60 N is a p p l i e d
5.0x10 kg. If a on the
wire. 2
of transverse waves
c a l c u l a t e the speed
15.0x10
kg.
T JA T A 0.72 m
4UT
Ü u r a 231gs e
R
O U T T O 2ACA151
D 60 N ,

following
Establish any one equation from the
3. (a)

A) v= Vo + at
(i) = v6 +2ax

OR/
acceleration a and
Establish a relation between linear 3
angular acceleration a.

or
time of flight
(b) Find out expression either for
maximum height of an object in
a n inclined projection.

conservation of momentum.
(c) State and prove the law of
1+2-3

OR/7

theorem. 3
State and prove work-energy

9)
(d) State Pascal's law. Find out the force
Fa acting on the
large piston of a hydraulic
small piston is F1. press if the force on the
1+2-3

OR/WR7
The density of the
atmosphere at sea level is
1-29 kg m". If it is considered to be
constant,
calculate the height of the atmosphere. Given, 1 atm
pressure at sea level is 1.013x10 Pa.
3

IS 78T A 1-29 kg m. z YT T 1
1.013x10° Pa.

(e) Defining coefficient of volume expansion, show that
it is equal to three times the coefficient of linear
expansion. 1+2-3

OR/Te7

Defining coefficient of surface expansion, show that
it is equal to two times the coefficient of linear
expansion. 1+2=3

/116 [Contd

10 )
amount
of
the
p r o c e s s ,

isothermal

n o w
that in an

work done is
V2 3
W uRT InV

W u RT In V2
2
VI
OR 7
woTK
or
amount
process,
the
adiabatic
Show t h a t in a n

done is
w -uR(T-T2) 3
W
-1

w -HR(Ti-T2)
-1

ORyT

the help
of temperature with
Give the interpretation
m e a n by degrees of
of kinetic theory. What do you 2+1-3
freedom?

resultant of two vectors
of the
4. (a) Find the magnitude
and the angle
A and B in terms of their magnitudes
condition for maximum
e between them. Obtain the
and minimum values of the
resultant vector. 3+(1+1)=5

11)
OR/ye7
Deduce an expression for centripetal acceleration (ac)
as given below :
5

a.

of
b) State and prove the principle of conservation
mechanical energy. 1+4-5

OR/yA7

What do you mean by conservative force? Derive an
expression for the potential energy of a spring. 1+4-5

(c) State and prove Bernoulli's theorem or principle. 1+4=5

OR/77

What is viscosity of liquid? Define coefficient of
viscosity and mention its unit. Write Stokes' law in its
mathematical form and define terminal velocity.
1+1t +h*1=5

Contd.

12)
aDefine latent heat of fusion and latent heat oof
showing the
Vaporisation. Draw a neat diagram
of ice of
relationship between heat supplied to a piece
unit mass and its rise of temperature during change o
1%+1%+2-5
state from ice to steam.

OR/9

2%x2=5
Write short notes on any two of the following:

() Escape velocity

i) Simple pendulum

fii) Carnot engine

ip) Beats

(v) Capillarity

(ui) Resonance
T

/116 22C