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Objective Part |
Name:_______________________ Date:_______________
1. Which one of the following unit is not a derived unit?
(a) pascal (b) kilogram (c) newton (d) watt
2. A measuring cylinder is used to measure.
(a) mass (b)
area (c) volume (d) level of liquid
3. A ball is thrown vertically upward. Its velocity at the highest point is:
(a) -10 ms-1 (b) zero
(c) 10 ms-2
(d) none of them
4.
Inertia depends upon:
(a) force (b) net force (c) mass
(d) velocity
5.
Racing cars are made stable by:
(a) increasing their speed (b) decreasing their mass (c) lowering their
center of gravity
(d) decreasing their width
6. Earth’s gravitational force of attraction vanishes at:
(a) 6400km
(b) infinity (c) 42300
km (d) 1000 km
7. Which one of the following converts light energy into electrical energy?
(a) Electric bulb (b) Electric generator (c) Photocell (d) Electric
cell
8. What should be the approximate length of a glass tube to construct a water barometer?
(a) 0.5 m (b) 1 m
(c) 2.5 m (d) 11m
9.
SI unit of pressure is the pascal, which
is equal to:
(a) 104 Nm-2 (b) 1 Nm -2 ( c) 102 Nm-2 (d) 103 Nm-2
11. Rooms are heated using gas heaters
(a)
Conduction only (b)
Convection and radiation (c)
Radiation only (d) Convection
only
12. The example of a bad conductor is:
(a) Wool (b) Copper
(c) gold (d)
iron
Subjective Part
Subject: Physics 9TH Class: IX Total Marks:12+ 48=60
Note: All questions are to be
attempted on the answer book.
2.
Answer any FIVE (5) of the following
questions. (5×2=10)
a) What role SI Units have played in the development of Science?
b) What is gravitational acceleration? Also, write its value.
c) Give two differences between Mass & Weight.
d)
What is meant by rigid body and axis
of rotation?
e)
How can you say that gravitational
force is a field force?
f) Define work. Write its condition, formula, and unit.
g) What are the features of a kinetic molecular model of matter?
3.
Answer briefly any five (5) parts of the
following. (5×2=10)
a)
What do you mean by lower and upper
fixed points?
b) Why does the sea breeze blow during the day?
c) Explain the Emission and Absorption of Radiation.
d)
what is the internal energy of a body?
e) State Pascal’s law. What are its applications in our daily life?
f)
What is the SI unit of power? Define
it.
g)
How the value of ‘g’ varies with
altitude?
4.
Write short answers to any FIVE (5) of the
following questions. (5×2=10)
a) Define a Couple. How is the torque produced in the right body due to the couple?
b) State Newton's first law of motion. Why is it called the law of inertia?
c) Derive the equation of motion which is independent of distance.
d) What role SI Units have played in the development of Science?
e) Differentiate between Speed and Velocity.
f) Why is rolling friction less than sliding friction?
g) How can you find the center of gravity of an irregularly shaped body? Explain it with the help of an experiment.
Note: Attempt any Two ( 2 ) questions.
(2×9=18)
1) (a ) Derive
the equation of motion which is independent of distance with the help of
a speed-time
graph.
(b) The steering of a car has a radius of 16 cm. Find the torque produced by a couple of 50 N.
2) (a) Define and explain evaporation. What are the factors on which it depends?
(b) The mass of 200 cm3
of stone is 500 g. Find its density.
3) (a) What do you mean by the pressure of liquids? Also, prove that P= rgh.
(b) What is the Atwood
machine Explain with the help of a suitable diagram.
