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Chapter 1 - Measurements - 5
1.
The supplementary units are:
a) Neutron & joules
b) Meter & Kilogram
c) Kelvin & Candela
d) Radian & Steradian
2.
The error in a measurement may occur due to:-
a) Negligence
b) All of the above
c) Inappropriate method
d) Faulty apparatus
3.
73.650 is rounded off as:-
a) 74.00
b) None of the above
c) 73.7
d) 73.6
4.
In any measurement, the accurately known digits and the first doubtful digit are called:-
a) Significant figures
b) doubtful figures
c) Measuring figures
d) Accurately figures
5.
The least count of meter rod is:-
a) Can not be zero
b) 0.01 cm
c) Can be zero
d) 0.01 mm
6.
Each base quantity is considered a dimension denoted by a specific symbol written within:-
a) Braces bracket
b) None of the above
c) Square brackets
d) Small brackets
7.
The term
Ö
f x l / m has dimensions:-
a) [LT]
-1>
b) [L
-1
T]
c) [LT
-1
]
d) [LT]
8.
How many seconds are there in 1 year?
a) None of the above
b) 31.536 x 10
7
s
c) 3.1536 x 10
7
s
d) 0.31536 x 10
7
s
9.
How many years in one second?
a) 3.1 x 10
-9
yr
b) 3.1 x 10
6
yr
c) 3.1 x 10
-7
yr
d) 3.1 x 10
-8
yr
10.
How many meters are there in one light year (speed of light = 3.0 x 10
8
m/s):-
a) None of the above
b) 9.5 x 10
12
m
c) 9.5 x 10
16
m
d) 9.5 x 10
14
m
11.
If the reading is taken with measuring scale whose minimum division is 1 mm, then correct reading is:-
a) 0.2145 m
b) None of the above
c) 0.214 m
d) 0.21 m
12.
A precise measurement is one which has:-
a) Less precision
b) None of the above
c) Maximum precision
d) Absolute precision
13.
Time taken by light to cover a distance from moon to earth is:-
a) 8 min 20 sec
b) 1 min 20 sec
c) I hr 20 sec
d) 2 mint 20 sec
14.
The uncertainty in the time period of a vibrating body in found by:-
a) Least count -- No. of vibrations
b) Least count / No. of vibrations
c) Least count x number of vibrations
d) Least count / No. of vibrations x 100 %
15.
Physical quantities are usually divided into _________________
a) Four categories
b) Five categories
c) Two categories
d) Three categories
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