9th Class Physics Past Paper 2022 Evening
Note: Physics 2nd Time Paper of 9th Class.
Group-II (Subjective) 40 Marks
Part– I
Q.2 Write short answers to any FIVE (5) questions:
(i) Differentiate between Geophysics and Plasma Physics.
(ii) Define acceleration and write down its SI unit.
(iii) State Newton’s second law of motion.
(iv) Write the number of significant figures in each case:
(i) 275.00
(ii) 0.027
(v) Define base units. Write down the base units of temperature and electric current.
(vi) Differentiate between circular motion and rotational motion.
(vii) SI unit of force is Newton. Define one Newton.
(viii) Differentiate between rest and motion.
Q.3 Write short answers to any Four (4) questions:
(i) Describe like and unlike parallel forces.
(ii) What is meant by rigid body and line of action of force?
(iii) Why are vehicles made heavy at the bottom?
(iv) Why can we not feel gravitational force around us?
(v) What is meant by gravitational field strength?
(vi) What is the difference between artificial and natural satellites?
(vii) Define work. On what factors does work depend?
(viii) Describe Einstein’s mass-energy equation.
Q.4 Write short answers to any Four (4) questions:
(i) Define the principle of flotation.
(ii) Why is water not suitable to be used in a barometer?
(iii) Why does the atmospheric pressure vary with height?
(iv) Write down applications of thermal expansion.
(v) Differentiate between temperature and heat.
(vi) Why does thermal energy flow from a hot body to a cold body?
(vii) Why does conduction of heat not take place in gases?
(viii) What is the greenhouse effect?
PART-II
Note: Attempt any TWO questions.
Q.5
(a) State Newton’s first law of motion and explain with the help of two examples.
(b) Find the retardation produced when a car moving at a velocity of 30 m/s-1 slows down uniformly to 15 m/s-1 in 5 s.
Q.6
(a) Explain the motion of artificial satellites and derive the formula for orbital speed near Earth.
(b) Find the magnitude and direction of the force, if its x-component is 12 N and y-component is given.
Q.7
(a) State Pascal’s law and explain the hydraulic press.
(b) A brass rod is 1 m long at 0°C. Find its length at 30°C. The coefficient of linear expansion of brass is 1.9 × 10⁻⁵ K-1.