11th Physics - Lesson 7,8 Model Question Papers

 MODEL QUESTION PAPER – 2023
LESSON – 7 AND 8

SUB: PHYSICS (E/M) - CLASS : Xl
DATE : 13.12.2023 TOTAL MARK : 20M

PART – A ( 5 X 1 = 5M)

Choose the best correct answer
1. Stress is a quantity …………
a)Tensor b) scalar c) vector d) both a and b
2. The density of mercury is . …………
a) 13.6 b) 136 c) 1360 d) ) 13600
3. The efficiency of petrol engines are maximum up to ………….%
a) 30 b) 40 c) 44 d) 65
4. The adiabatic process Q = ……
a) zero b) maximum c) minimum d) infinity
5. The thermal conductivity is the ability to conduct ………………
a) heat b) temperature c) radiation d) convection

PART – B ( 5 X 2 = 10M)

Answer any FIVE Questions
6. What do you mean by capillarity
7. Distinguish between cohesive and adhesive force
8. State the law of flotation
9. Define the quasi – static process
10. What are the different types of thermodynamic systems ?
11. Define latent heat capacity Give its unit
12. Two pistons of a hydraulic lift have diameters of 60 cm and 5 cm. What is the force exerted by the
larger piston when 50 N placed on the smaller piston ?
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PART – C ( 1 X 5 = 5M)
Answer ALL questions
13.a) State Hooke’s law and verify it with the help of an experiment
(or)
b) Derive the expression for Carnot engine efficiency
prepared by

Dr .G. THIRUMOORTHI , M.Sc ,B.Ed ,Ph.D (PHYSICS )
Assistant professor
Govt Arts college (A)
Salem – 7
8610560810
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