MODEL QUESTION PAPER-1

FOR MID TERM EXAMINATIONS 2024-25

(SYLLABUS: ALL CHAPTERS OF VOL-1)

I PUC - PHYSICS (33)

Time: 3 hours. No of questions: 45 Max Marks: 70
General Instructions:
1. All parts 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 detailed solutions will not carry any marks.
PART – A
I. Pick the correct option among the four given options for ALL of the following
questions: 15 × 1 = 15
1. The number of significant figures in 0.2370 is
(A) 2 (B) 3 (C) 4 (D) 5
2. The slope of the tangent drawn to position-time graph at a particular instant gives
(A) instantaneous acceleration (B) instantaneous velocity
(C) average acceleration (D) average velocity
3. The stopping distance of a vehicle is directly proportional to
(A) square of initial velocity (B) magnitude of the deceleration produced by the brakes
(C) initial velocity (D) square of the magnitude of deceleration produced by the brakes
4. A vector is multiplied with a scalar. The resulting quantity is
(A) a scalar having same dimensions as initial vector.
(B) a vector having same dimensions as initial vector.
(C) a vector having dimensions different from that of initial vector.
(D) a scalar having dimensions different from that of initial vector.
5. The horizontal range of a projectile is maximum for angle of projection equal to
(A) 300 (B) 900 (C) 450 (D) 600
6. If the net external force on a body is zero, its acceleration ………
(A) is non zero (B) is zero
(C) is infinite (D) gradually changes from zero to non zero
7. In case of the motion of a car on a banked road, the required centripetal force is provided by
(A) the static friction between road and the car tyres only.
(B) the normal reaction exerted by the road on the car only.
(C) the horizontal components of the normal reaction and the frictional force.
(D) the vertical components of the normal force and the frictional force.
8. An impulsive force is
(A) a large force acting for large interval (B) a small force acting for large interval
(C) a small force acting for short interval (D) a large force acting for short interval
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9. 1 eV is equal to
-19 -7
(A) 4.186 J (B) 1.6 x 10 J (C) 3.6 x 106 J (D) 10 J

10. The potential energy of a spring is given by the expression (with symbols having their usual
meaning)

kx kx2 2x2 2x
(A) V(x) = (B) V(x) = (C) V(x) = (D) V(x) =
2 2 k k
11. ‘Rolling of a cylindrical body down an inclined plane’ is an example for
(A) pure rotational motion.
(B) pure translational motion.
(C) a motion containing both translation and rotation.
(D) rotational motion with axis of rotation oscillating.
12. The centre of mass of a thin uniform rod of length ‘L’ lies
L
(A) at a distance from any one end of the rod (B) at any one end of the rod
4
(C) outside the rod (D) at the geometric centre of the rod
13. A couple is a system of two forces having _____________
(A) same magnitude acting in same direction.
(B) different magnitude acting in same direction.
(C) same magnitude acting in opposite directions with their lines of action coinciding.
(D) same magnitude acting in opposite directions with different lines of action.
14. If T is the period of revolution of a planet moving in an elliptical path with semi major axis of
length ‘a’, then
3
(A) T α a (B) T α a2 (C) T α a 2 (D) T α a3
15. If E and K are the total energy and kinetic energy of a circularly orbiting satellite, then
(A) E is positive and K is negative (B) E is negative and K is positive
(C) both E and K are positive (D) both E and K are negative
II. Fill in the blanks by choosing appropriate answer given in the brackets for ALL
the following questions: 5×1=5
(inertia, zero, scalar, kinetic energy, one, vector)
16. The magnitude of a unit vector is ______________.
17. The inability of a body to change its state of rest or uniform motion, unless an external force acts is
called __________.
18. The energy possessed by a body due to its motion is called ____________.
19. The angular velocity is a____________.
20. The weight of a body at the centre of earth is ______________.

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 PART – B
III. Answer any FIVE of the following questions: 5 × 2 = 10
21. Mention any two applications of v-t graph.
22. Draw a-t graph for a particle (i) moving with uniform acceleration in positive direction and
(ii) moving with non – uniform acceleration in positive direction.
23. Define instantaneous velocity. Write the expression for instantaneous velocity in case of a body
under two dimensional motion.
24. State and explain parallelogram law of vector addition.
25. Find the magnitude of the minimum resultant force possible by considering two forces of magnitude
8 N and 6 N.
26. Define work done by a force. Give its dimensional formula.
27. Mention any two differences between scalar product and vector product of two vectors.
28. What is meant by escape speed? Give the value of escape speed on the surface of earth.
PART – C

IV. Answer any FIVE of the following questions: 5 × 3 = 15

L
29. The period of oscillation (T) of a simple pendulum of length (L) has been given as T=2  . Check
g
the dimensional correctness of the equation.
30. Obtain the expressions for magnitude and direction of a vector in terms of its x and y components.
31. What is meant by uniform circular motion? Give the expression for centripetal acceleration and explain
the terms.
32. Explain the law of conservation of linear momentum with an illustration.
33. Mention any three advantages of friction.
34. What are conservative forces? Give any two examples.
35. Give the equations of kinematics for rotational motion.
36. A solid cylinder of mass 20 kg is rotating about its axis with angular speed of 100 rads-1. The radius of
the cylinder is 0.25m. Find the magnitude of angular momentum of the cylinder about its axis of
rotation.

PART – D
V. Answer any THREE of the following questions: 3 × 5 = 15
37. Show that the trajectory of a projectile is a parabola.
38. a) State and explain Newton’s 2nd law of motion. (2)
b) Derive the expression F = ma. (3)
39. State and prove work – energy theorem for a constant force.
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40. a) Define moment of force acting on a particle. Mention its SI unit. (2)

dL 
b) Derive the relation   in case of a single particle under rotational motion. (3)
dt
41. Derive an expression for acceleration due to gravity at a height ‘h’ above the surface of the earth.

VI. Answer any TWO of the following questions: 2 × 5 = 10

42. A stone is thrown vertically upwards with a speed of 20 m/s from the top of a building.
The height of the building is 25m from the ground. a) How high will the ball rise? b) How long will it
take to reach the ground? Given: g = 9.8 ms-2.
43. A body of mass 8 kg is suspended by a rope from the ceiling. A force of 60 N in the horizontal
direction is applied on the body. What is the angle the rope makes with the vertical in equilibrium?
(Take g = 10 ms-2). Neglect the mass of the rope.
44. A pump on the ground floor can pump water to fill a tank of volume 1.5 m3 in 10 minutes. The tank is
40m above the ground. Calculate the mass of water lifted by the pump in 10 min and the electric power
consumed by it.
Given: Density of water = 1000 kgm-3 and g = 9.8 ms-2.
45. A satellite of mass 500 kg revolves round the earth in a circular orbit at a height of 1200 km from the
surface of the earth. Calculate i) the orbital speed and ii) period of rotation of the satellite at this height.
Given: G = 6.67  10 Nm2 kg–2, Mass of earth = 6  10 kg and Radius of earth = 6.4  10 m.
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