Q1. Choose the correct option. 10×1=10
1
Which one is non-physical quantity?
A
Distance
B
Density
C
Colour
D
Temperature
2
The number of base quantities are:
3
Identify the derived quantity:
A
Electric current
B
Amount of substance
C
Volume
D
Time
4
The unit of mass is:
A
Second
B
Meter
C
Kilogram
D
Newton
5
Which one is a derived unit?
A
Newton
B
Mole
C
Meter
D
Second
6
One giga gram is equal to:
A
106 g
B
109 g
C
1012 g
D
1015 g
7
The least count of Vernier Caliper is:
A
0.01mm
B
0.001mm
C
0.1mm
D
0.001cm
8
How many divisions are in Vernier Scale of Vernier Caliper?
9
The number of significant figures in 0.00578 is:
10
The number of significant figure in 100.8 is:
Q2. Write down short answers of following questions. 15×2=30
I
Write the name of 3 base quantities and 3 derived quantities.
II
Define derived units with example.
III
Write name of seven base units.
IV
What are the values and symbols of prefixes of nano, Pico, micro, milli?
V
Define scientific notation with example.
VI
Find the value of the following quantities:
(a) (4 × 10³ kg) (6 × 10⁶ m)
(b) 6 × 10⁶ m³ / 2 × 10⁻² m²
VII
Define Parallel error.
VIII
Differentiate between positive zero error and negative zero error of Vernier Calipers.
IX
Define micrometer screw gauge.
X
Define least count of screw gauge.
xi
Define significant figures with example.
xii
Write two rules of significant figures?
xiii
Round off to two significant figures:
(i) 2.512 × 10³ kg
(ii) 3.456 × 10⁴ kg
xiv
How many types of physical quantities are there? Define with example.
xv
Name some repetitive processes occurring in nature which could serve as reasonable time standards.