Tamil Nadu (English Medium) Std 8 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
What would be the pressure exerted by a liquid column of height 15 cm on its bottom? g = 10 m/s², d = 800 kg/m³?

(A) 1000 Pa	(B) 1200 Pascal
(C) 12 pascal	(D) 10 Pa

Question-2
Hydraulic devices works on the principal of :

(A) Archimedes principal	(B) Bernoulli's principal
(C) Pascal's law	(D) Newton's law

Question-3
The force acting on a unit area is called :

(A) Pressure	(B) Thrust
(C) Tension	(D) Normal

Question-4
Barometer is used to measure :

(A) Force	(B) Velocity
(C) Pressure	(D) Mass

Question-5
The force exerted by a charged body on another charged or uncharged body is known as :

(A) Electric force	(B) Electric field
(C) Electric potential	(D) Electrostatic force

Question-6
The atmospheric pressure at sea level equal to :

(A) 120000 N/m²	(B) 150000 N/m²
(C) 10000 N/m²	(D) 100000 N/m²

Question-7
The Contact force is also termed as :

(A) Magnetic force	(B) Gravitational force
(C) Muscular force	(D) Electrostatic force

Question-8
From the following which one is used to reduce friction?

(A) Water	(B) Sand
(C) Grease	(D) Gravel

Question-9
When we hit a cricket ball with a cricket bat ,what will happen ?

(A) Its directions of motion changes and speed remains same	(B) Its direction of motion and speed changes
(C) Its direction of motion donot change	(D) Its speed remains the same

Question-10
'Friction can never be entirely eliminated'. This statement is :

(A) False	(B) True
(C) Sometimes true	(D) Sometimes false

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Std 8

Tamil Nadu (English Medium)

Practice in Related Chapters
Measurements
Force and Pressure
Electricity and Heat
Light and Sound