MODEL PAPER
JUNIOR INTERMEDIATE - PHYSICS
I. Answer all the following questions 10 x 2 = 20
1. What are the fundamental forces in nature?
2. The error in measurement of radius of sphere is 1%. What is the error in the measurement of volume?
3. The states of motion and rest are relative. Explain?
4. If a bomb at rest explodes into two pieces, the pieces must travel in opposite directions explain.
5. What is the moment of inertia of a ring about a tangent to the circle of the ring.
7. If an iron wire is stretched by 1%. What is the strain on the wire?
SECTION-I
10. What is green house effect? Explain global warming.
II. Answer any Six of the following questions. 6 x 4 = 24
11. Show that the trajectory of an object thrown at certain angle with the horizontal is a parabola.
12. Mention the methods used to decrease friction.
13. Find the centre of mass of three particles of an equilateral triangle. The masses of the particles are 100gr, 150gr
and 200 gr respectively is each side of an equilateral triangle is 0.5 long.
14. What is orbital velocity? Obtain an expression for it.
15. Describe the behaviour of wire under increasing load.
16. What is torroicelli's law? Explain how the speed of efflux is determined with an experiment.
17. Explain celsius and Fahrenheit scales of temperature. Obtain the relation between celsius and Fahrenheit scales
18. Explain the concept of absolute zero of the temperature on the basis of kinetic theory.
SECTION-II
SECTION-III
III. Answer any Two of the following questions. 2 x 8 = 16
19. What are collisions? Explain the possible types of collisions? Develop the theory of one dimensional elastic colli-
20. (a) Show that the motion of a simple pendulum is simple harmonic and hence derive an equation for its time period.
(b) What is the length of a simple pendulum, Which ticks seconds?
21. (a) Derive the relation between the two specific heat capacities of gas on the basis of first law of thermodynamics.
(b) Five moles of hydrogen when heated through 20K expand by an amount of 8.3 x 10–3m3
under a constant
=20J/mole.Kg, find CP
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