CBSE Class 11 Physics Sample Paper SA2 2014 (2)
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General Instructions –
• All the questions are compulsory.
• Question Nos. 1 to 8 carry 1 mark each. Question Nos. 9 to 18 carry 2 marks each. Question
Nos. 19 to 27 carry 3 marks each and Question Nos. 28 to 30 carry 5 marks each.
• There is no overall choice, however, an internal choice has been provided in one question of 2
marks, in one question of 3 marks and all three questions of five marks each.
• Use of calculator is not permitted.
• You may use log book if necessary.
Q.1 An elevator weighing 500kg is to be lifted up at a constant velocity 0.4 m/s. What should be
the power of motor to be used?
Q.2 Name the physical quantity expressed by moment of force. Is it a vector or scalar quantity?
Q.3 What is the nature of motion of an object falling freely under the action of gravity?
Q.4 What makes a water-proof raincoat water-proof?
Q.5 A gymnast with mass 50kg suspends herself from lower end of a rope. The upper end of
rope is attached to the ceiling. What is the tension at the top of the rope?
Q.6 When will the relative velocity of two moving objects be zero?
Q.7 Two sound sources produce 12 beats in 4 seconds. By how much do their frequencies
Q.8 State Zeroth law of thermodynamics.
Q.9 Establish the relation between angular momentum and moment of inertia for a rigid body.
Q.10 Show that the value of acceleration due to gravity decreases with the altitude.
Q.11 In a refrigerator, heat from inside at 277K is transferred to a room at 300K. How many
joules of heat shall be delivered to the room for each joule of electrical energy consumed
Q.12 A whistle of frequency 540 Hz rotates in a circle of radius 2m at an angular speed of 15
rad/sec. What is the lowest and highest frequency heard by a listener a long distance away,
at rest w.r.t. centre of the circle?
Q.13 A spring of force constant 1200 N/m is mounted horizontally on a horizontal table. A mass
of 3.0 kg is attached to the free end of the spring, pulled sideways to distance of 2.0 cm and
Frequency of oscillation of the mass ii) Angular frequency of the mass
iii) Maximum acceleration of the mass iv) Maximum speed of the mass
Springs of spring constant K, 2K, 4K, 8K …….. are connected in series. A mass ‘m’ is
attached to the lower end of the last spring and the system is allowed to vibrate. What is the
time period of oscillation?
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