Karnataka 1st PUC Mid Term Question Paper 2025 Physics

Government of Karnataka
Karnataka Secondary Education Examination Board

Question Papers
Mid Term

IPUC MID-TERM EXAMINATION, OCTOBER-2025
Time :3 Hours SUBJECT:PHYSICS (33) Max. Marks: 70

General Instructions :
1) All parts A to D are compulsory.
2) For Part-A questions, first written answer will be considered for awarding marks.
3) Answers without relevant diagram/figure/circuit wherever necessary will not carry any
marks.
4) Direct answers to the numerical problems without relevant formula and detailed solutions
will not carry any marks.
PART-A
Answer ALL of the following questions: 15x1=15
1) The physical quantity has SI unit but not dimensions
a) Radius b) Angle c) Angular velocity d) Angular momentum
2) The displacement ofa particle is represented by the equation x = 8t + 3t + 2 where x is in m
and t is in s. What is the acceleration of the particle
b) 4 ms-2 c) 16 ms-2 d) 3 ms-2
a) & ms
3) The slope of v-t graph gives
a) displacement b) velocity c) acceleration d) distance
4) The unit vector of vector A is

b) nslA| d) ñn.
a) n c) n=Ã
A |A|
5) The component of a vector r along X-axis will have maximum value if
a) r is along positive y-axis b) r is along negative y-axis
c)risalong positive x-axis d) r is along negative x-axis
6) For a given angle of projection of the projectile if one initial velocity is doubled. The range of
the projectile becomes
a) half b) two times c)one fourth d) four tmes
7) A body executing uniform has at instant its velocity vector and acceleration vector
a) along the same direction b) normal to each other
c) in opposite direction d) not related to each other

8) A person jumps trom a moving bus, one person falls in
a) backward direction b)Forward direction
c) Remains in straight direction d) None of these
9) A
Jet engine works on the principle of
a) conservation of mass
b) conservation of energy
c) conservation ofLinear momentum
d) conservation of angular momentum
10) Which of the following is a self adjusting force d) Allthe three
a) Limiting force b) Kinetic friction c)Static friction
abody is known as
11) The physical quantity which is equal to the change in momentum of
a) acceleration b) force c)normal reaction d) Impulse
12) Which of the following is not a unit of power
a) Newton b) Watt c) Kilowatt hour d) Horse power
(PT.O.)

-2
13) Ifthe kinetic energy of abody bccomes four tines of its initialvaluc, then the new momentum
will be
a) Four times of its initial value b) Remains same
c) Three times of its initialvalue d) twice its initial value
14) Moment of inertia is independent of its
a) Nature of distribution of mass b) Angular velocity
c) Axis of rotation d) different orientation of body
15) The vector product of two vectors is maximum when
a) =45° b) =90° c) =0° d) 9=1 80°

Fill in the blanks by choosing appropriate answer given in the bracket for all the
following questions: 5x1=5
(decreases, increases, zero, independent, dependent, maximum)
16) The vertical component of projectile at maximum height of the projectile is
17) The co-etticient of friction with Area.
18) In an non conservative forces the work done on a body on the path.
19) The potential energy of a body with height
20) Adiver in a swimming pool bends his head before diving because his moment
of inertia.
PART-B
II Answer any FIVE of the following questions: 5x2=10

21) Mention the SI unit of (i) pressure (ü) Torque.
22) Define : (i) uniform acceleration () non-uniform acceleration.
23) State and explain Triangle law of vector addition.
24) Mention the types of Inertia.
25) A body of mass 2 kg is placed on a horizontal surface co-efficient of friction 0.5. Calculate
the frictional force arises between two surfaces.
26) Showthat P =F.ù symbols having usual meanings.
27) Write the conditions for the mechanical equilibrium of a rigid body.
28) Define angular momentum of a particle when it is maximum.
PART-C
Answer any FIVE of the following questions: Sx3=15
IV
29) Mention the applications of Dimensional analysis.
30) The displacement (in metre) of aparticle moving along x-axis is given by x = 18t + 5t. Calculate
average velocity between t= 3s and t= Ss.
31) Derive an expression for Range of the projectile.
32) Derive an expression of magnitude of the resultant of two vectors acting at point using parallelo
gram law of vector addition.
33) Derive F= mã
34) State and prove work-energy theorem for a constant force.
35) Give the differences between conservative and non-conservative forces with examples.
36) Define vector product of two vectors when it is maximum and minimum.

(P.T.0.)

-3

PART-D
V Answer any THREE of the following questions: 3x5=15
37) Derive V²= u' + 2as using velocity-time graph.
38) Deduce an expression for centripetal acceleration.
39) State and prove the law of conservation of Linear Momentum using Newton's third law.
40) Show that total mechanical energy is conserved for freely falling body.
41) a) What is centre ofMass of a body. (1)
b) Write the expression for centre of Mass of system of two particles and explain the terms.
(2)
c) Define Radius of gyration. Mention its SI unit. (2)
VI Answer any TWO of the following questions: 2x5=10
42) Aprojectile is fired with horizontal velocity of 30ms from the tops ofa cliff 80 mhigh. How
long will it take to strike the level ground at the base of the cliff ? With what velocity will it strike?
(Neglect air resistance)
43) A bullet of mass 0.05 Kg enters a block of wood with a velocity of 300 ms and penetrates
toa depth of0.1 m. Calculate the average force of the wood tothe penetration of the bullet.
44) Atrain of mass 200 tonsis running on level rails with a uniform velocity of 108 Km hr. If the
resistance to its motion is 2 Kg wt per ton, find power of the engine.
45) The speed of a wheel increases from 300 rpm to 900 rpm in 10s. How many revolutions does
it make in this interval of time.
*** *

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