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Physics 9 Chapter 1 - Physical Quantities and Measurements - 14
1.
The reading becomes doubtful if the eye is positioned ........................to the reading point?
a) Right
b) Vertically
c) Both b and c
d) Left
2.
A measuring tape consists of a thin and long strip of.........................?
a) All may be correct
b) Plastic
c) Metal
d) Cotton
3.
The scale on measuring tape is marked with..............?
a) Both b and c
b) Inches
c) Centimetres
d) Metres
4.
What is the accuracy obtained in measurements using a metre rule?
a) 1mm
b) 1cm
c) 0.001cm
d) 0.1mm
5.
How many jaws a Vernier callipers contains?
a) Three
b) Five
c) Four
d) Two
6.
To which of the following jaw, main scale is attached?
a) None of these
b) Flexible jaw
c) Moveable jaw
d) Fixed jaw
7.
Main scale has ............................marks on it?
a) Inches
b) Micrometres
c) Metres
d) Centimetres
8.
How many divisions Vernier scale have?
a) 10
b) 12
c) 15
d) 11
9.
What is the length of one division on Vernier scale?
a) 0.8 mm
b) 1.0 mm
c) 0.9 mm
d) 1.1 mm
10.
What is the difference between one small division on main scale division and one Vernier scale division?
a) 0.2 mm
b) 0.2 mm
c) 0.2 mm
d) 0.1 mm
11.
What is the least count of Vernier callipers?
a) 0.3 mm
b) 0.2 mm
c) 0.4 mm
d) 0.1mm
12.
What is the least count of Vernier callipers in cm?
a) 0.001 cm
b) 0.01cm
c) 0.1cm
d) 0.10 cm
13.
In working of a Vernier Callipers, what should we do first?
a) Find the diameter of the object
b) Fix the object in the jaws
c) Apply zero correction
d) Find zero error
14.
Knowing the zero error, necessary correction can be made to find the correct measurement. What is this correction called?
a) Zero correction
b) Zero cutting
c) All are correct
d) Zero application
15.
Zero correction is always ............................of zero error?
a) -1
b) Negative
c) +2
d) Positive
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