Tamil Nadu (English Medium) Std 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
The most accurate time measurement device is:

(A) Quartz clock	(B) Electrical Oscillators
(C) Caesium - atomic clock	(D) Seconds Pendulum

Question-2
Which of the following is used in measuring weight in jewellery shop?

(A) Beam balances	(B) Medical scale
(C) Physical balance	(D) Digital balance

Question-3
Which instrument in measuring time, consisting of two glass chambers connected by a narrow neck and containing a quantity of sand?

(A) Sundial	(B) Mechanical clock
(C) Atomic clock	(D) Sand clock

Question-4
Which of the following instrument is more accurate in taking measurements?

(A) Vernier calipers	(B) Digital vernier calipers
(C) Metre scale	(D) Ordinary scale

Question-5
Which of the following instrument is used to measure the internal diameter of a pipe with a single measurement?

(A) Manometer	(B) Measuring cylinder
(C) Micrometer screw gauge	(D) Vernier calipers

Question-6
Which of the following is used to measure the distance of a star from the earth?

(A) Kilometer	(B) Hectometer
(C) Light year	(D) None of these

Question-7
Which element is used as the electronic oscillator in quartz clock?

(A) Sand	(B) Iridium
(C) Quartz	(D) Diamond

Question-8
What is the SI unit of weight?

(A) Newton	(B) Kilogram
(C) Joule	(D) Pascal

Question-9
Atomic clock works on periodic vibration taking place in

(A) Uranium atom	(B) Plutonium atom
(C) Carbon atom	(D) Ceasium atom

Question-10
What is the unit of mass?

(A) Gm	(B) Kg
(C) Cm	(D) Mm

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Std 9

Tamil Nadu (English Medium)

Practice in Related Chapters
Motion and Liquids
Sound
Work, Power, Energy and Heat
Measuring Instrument