Physics class ix notes 9th class board pattern model paper
Physics Chapter No-01 Important questions, if you attempt these question you will get InshaAllah 100% marks.
Physics
Objective
Part
Choose the right option.
10*1=10
A
|
B
|
C
|
D
|
||
1
|
Sound deals with physical aspects
of:
|
Sound
waves
|
Its
production
|
Its
properties
|
All
of these
|
2
|
1 m3 is equal to:
|
1
L
|
10
L
|
100
L
|
1000
L
|
3
|
The eleventh general conference
on weight and measures was held on:
|
1950
|
1960
|
1965
|
1988
|
4
|
Which of the following is not a
derived quantity?
|
Electric
charge
|
Density
|
Pressure
|
Amount
of substance
|
5
|
A number of 62750 in standard
form can be expressed as:
|
62.75×103
|
6.275×104
|
0.6275×105
|
All
of these
|
6
|
The least count of meter rule is
|
0.1mm
|
0.01mm
|
1mm
|
0.001mm
|
7
|
The number of divisions around
one end of the thimble are:
|
10
|
20
|
50
|
100
|
8
|
In a physical balance, known mass
is placed in the:
|
Right
pan
|
Left
pan
|
Middle
of the balance
|
Both
(b) and (c)
|
9
|
1.45 is rounded to:
|
1.4
|
1.46
|
1.5
|
1.6
|
10
|
In the measurement 275.00mm, the
significant digits are:
|
3
|
5
|
6
|
None
of these
|
Subjective
Answer the following
short questions.
1.
Define Mechanics and Geophysics.
2.
Estimate your age in seconds.
3. Define significant figures with example.
4.
Differentiate between mechanical and
digital stop watch.
5.
How we can find out the least count of
screw guage?
6.
Write the numbers given below in
scientific notation.
(a) 3000000000
ms-1 (b)
6400000 m
(c) 0.0000000016 g (d) 0.0000548s
(c) 0.0000000016 g (d) 0.0000548s
7.
Write down the base quantities, their SI
units with symbols.
8.
How do the prefixes micro, nano and pico
relate to each other?
9.
What is the difference between base
quantities and derived quantities? Give two examples in each case.
10.
What is meant by vernier constant?
Long Question
1. (a)
Write down the rules to find out the significant digits in a measurement?
(b) A chocolate wrapper is 6.7cm long and 5.4 cm wide. Calculate the area up to reasonable number of significant figures.
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