9th Class Physics Past Paper 2023 Evening
Note: Physics 2nd Time Paper of 9th Class.
Group-II (Subjective) 48 Marks
Part– I
Q.2 Write short answers to any FIVE (5) questions:
Q.2 Write short answers to any Five (5) questions:
(i) What are prefixes and give two examples.
(ii) Define the least count of vernier callipers and write the value of the least count of vernier callipers in centimetres.
(iii) Define plasma physics.
(iv) Differentiate between scalar and vector quantities.
(v) What do you know about a LIDAR gun?
(vi) Define uniform acceleration. State Newton’s third law of motion and give one example.
(vii) Write two methods of reducing friction.
Q.3 Write short answers to any Five (5) questions:
(i) Define stable equilibrium.
(ii) What is the first condition for equilibrium?
(iii) Define clockwise and anti-clockwise.
(iv) Define geostationary Orbit.
(v) What is meant by a natural satellite?
(vi) How does the value of ‘g’ vary with altitude?
(vii) Define biomass energy and geothermal energy.
(viii) What is meant by power and watt?
Q.4 Write short answers to any Five (5) questions:
(i) Define density and also give its SI unit.
(ii) State Pascal’s law.
(iii) What is meant by the elastic unit?
(iv) Define volume thermal expansion.
(v) Convert 100°F into the temperature on the Celsius scale.
(vi) Why does the conduction of heat not take place in gases?
(vii) Why does the sea breeze blow during the day?
(viii) Write down two uses of insulators.
PART-II
Note: Attempt any TWO questions.
Q.5
(a) Draw the speed-time graph and derive the second equation of
(b) A body has a weight of 20 N. How much force is required to move it vertically upward with an acceleration of 2 m/s–²?
Q.6
(a) What is the center of gravity? Explain how you can find the center of gravity of an irregularly shaped thin lamina.
(b) A block weighing 20 N is lifted 6 m vertically upward. Calculate the potential energy stored in it.
Q.7
(a) Explain linear thermal expansion in solids.
(b) The density of air is 1.3 kg/m–³. Find the mass of air in a room measuring 8m x 5m x 4m.