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
What is the SI unit of weight?

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

Question-2
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-3
Which of the following is the part of a vernier caliper that is used for measuring the external diameter of a cylindrical tube?

(A) Outside jaw / external jaw	(B) Inside jaw / internal jaw
(C) Tail	(D) None of the above

Question-4
Which of the following is the SI unit for length?

(A) Centimetre	(B) Metre
(C) Kilometre	(D) Mile

Question-5
Atomic clock works on periodic vibration taking place in

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

Question-6
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-7
Name a device used to measure the short time intervals?

(A) Wrist watch	(B) Stop watch
(C) Screw gauge	(D) Vernier caliper

Question-8
Which element is used as the electronic oscillator in quartz clock?

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

Question-9
What is the unit of mass?

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

Question-10
Micrometer screw gauge is used to measure very small objects to

(A) 1 cm	(B) 0.1 cm
(C) 0.01 cm	(D) 0.001 cm

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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