9th Class Physics Past Paper 2019 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:
(i) Define physical sciences and biological sciences.
(ii) What is meant by physical quantities? Give two examples.
(iii) What is meant by prefixes?
(iv) Define velocity and write its S.I. unit.
(v) Define vibratory motion and give its example.
(vi) State Newton’s third law of motion and write two examples.
(vii) What is meant by tension in a string?
(viii) Define co-efficient of friction and write its equation.
Q.3 Write short answers to any Five (5) questions:
(i) Why are vehicles made heavy at the bottom?
(ii) What is meant by neutral equilibrium?
(iii) What are the natural satellites?
(iv) What is the value of ‘g’ at the moon and mars?
(v) What is the difference between ‘g’ and ‘G’?
(vi) What is the second name of a solar cell and how is it made?
(vii) Define energy and write its S.I unit.
(viii) On which factors does work depend?
Q.4 Write short answers to any Five (5) questions:
(i) State Pascal’s Law.
(ii) State Archimedes’ Principle.
(iii) Define elasticity and stress.
(iv) Define lower and upper fixed points.
(v) Write two applications of thermal expansion.
(vi) Define conduction.
(vii) Define convection.
(viii) Define radiation.
PART-II
Note: Attempt any TWO questions.
Q.5
(a) How can you relate a S force with the change of momentum of a body and prove that:
(b) A train slows down from 80 km/h-1 with a uniform retardation of 2 m/s-2. How long will it take to attain a speed of 20 km/h-1?
Q.6
(a) Define equilibrium and explain its three states.
(b) Calculate the power of a pump which can lift 200 kg of water through a height of 6 m in 10 seconds.
Q.7
(a) Define specific heat. How would you find the specific heat of a solid?
(b) The head of a pin is square with a side of 10 mm. Find the pressure on it due to a force of 20 N.