XI Standard - 11th - Physics - August Monthly Test Question Paper - Samacheer Kalvi
AUGUST MONTHLY TEST
CLASS: 11 TOTAL MARKS: 50
SUBJECT: PHYSICS TIME: 1.30 hrs
PART-I
Choose the correct answer: 10x1=10
1. The work done by the conservative force for a closed path is
(a) always negative (b) zero (c) always positive (d) not defined
2. If the linear momentum of the object is increased by 0.1%, then the kinetic
energy is increased by
(a) 0.1 % (b) 0.2% (c) 0.4% (d) 0.01%
3. Two equal masses m1 and m2 are moving along the same straight line
with velocities 5ms-1 and -9ms-1respectively. If the collision is elastic,
then calculate the velocities after the collision of m1 and m2, respectively
(a) -4ms-1 and 10 ms-1 (b) 10ms-1 and 0 ms-1
(c) -9ms-1 and 5 ms-1 (d) 5 ms-1 and 1 ms-1
4. A couple produces,
(a) pure rotation (b) pure translation (c) rotation and translation (d) no motion
5. A particle undergoes uniform circular motion. The angular momentum of the
particle remain conserved about,
(a) the centre point of the circle. (b) the point on the circumference of the circle.
(c) any point inside the circle. (d) any point outside the circle.
6. A particle is moving with a constant velocity along a line parallel to positive
X-axis. The magnitude of its angular momentum with respect to the origin is,
(a) zero (b) increasing with x (c) decreasing with x (d) remaining constant
7. The linear momentum and position vector of the planet is perpendicular to
each other at
(a) perihelion and aphelion (b) at all points (c) only at perihelion (d) no point
8. The time period of a satellite orbiting Earth in a cirular orbit is independent
of
(a) Radius of the orbit (b) The mass of the satellite
(c) Both the mass of the satellite and radius of the orbit
(d) Neither the mass of the satellite nor the radius of its orbit
9. Unit of Gravitational potential is
(a) J kg (b)J kg-1 c) N m (d) Nm-1
10. Which of the following quantity has no origin?
(a) gravitational force (b) Centripetal force (c) Centrifugal force (d) Inertia
PART-II
Answer any five questions (Q.No-18 is compulsory) 5x2=10
11. Define: Coefficient of restitution
12. Explain how the definition of work in physics is different from general
perception.
13. Give any two examples of torque in day-to-day blife.
14. Define torque mention its unit.
15. State Newton’s law of gravitation.
16. Calculate the work done by a force of 30 N in lifting a load of 2kg to a height
of 10m (g = 10 m s−2)
17. Define: Gravitational potential energy
18. A force of (4î - 3ĵ + 5k̂) N is applied at a point whose position vector is and
(7î + 4ĵ - 2k̂) m. Find the torque of force about the origin.
PART-III
Answer any five questions (Q.No-26 is compulsory) 5x3=15
19. Write the difference between conservative and Non-conservative force. Give two
examples for each.
20. Arrive at an expression for power and velocity. Give some examples for the
same.
21. What is the difference between sliding and slipping?
22. State and prove perpendicular axis theorem.
23. State Kepler’s three laws.
24. Explain the variation of g with altitude.
25. Derive the expression for moment of inertia of a uniform rod about its center
and perpendicular to the rod.
26. Calculate the value of g in the following two cases:
(a) If a mango of mass 1⁄2 kg falls from a tree from a height of 15 meters,
what is the acceleration due to gravity when it begins to fall?
(b) Consider a satellite orbiting the Earth in a circular orbit of radius
1600 km above the surface of the Earth. What is the acceleration
experienced by the satellite due to Earth’s gravitational force?
PART-IV
Answer the following questions in detail. 3x5=15
27. Prove that at points near the surface of the Earth, the gravitational potential
energy of the object is U=mgh
(OR)
Explain the variation of g with depth from the Earth’s surface.
28. Derive the expression for moment of inertia of a uniform ring about an axis
passing through the centre and perpendicular to the plane.
(OR)
Explain why a cyclist bends while negotiating a curve road? Arrive at the
expression for angle of bending for a given velocity.
29. Arrive at an expression for elastic collision in one dimension and discuss
various cases.
(OR)
State and explain work energy principle. Mention any three examples for it.
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