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Chapter 1 - Measurements - 2
1.
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
2.
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
3.
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
4.
A precise measurement is one which has:-
a) Less precision
b) None of the above
c) Maximum precision
d) Absolute precision
5.
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
6.
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 %
7.
Physical quantities are usually divided into _________________
a) Four categories
b) Five categories
c) Two categories
d) Three categories
8.
There are ________________________ base units for various physical quantities.
a) 7
b) 5
c) 9
d) 6
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