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
Pinna is a part of :

(A) Inner ear	(B) Ear tube
(C) Middle ear	(D) Outer ear

Question-2
The human ear can hear sound of range :

(A) 20Hz - 200kHz	(B) 20Hz - 20kHz
(C) 2Hz - 20kHz	(D) 20KHz - 200kHz

Question-3
Stem and prongs are the parts of :

(A) Violin	(B) Tuning fork
(C) Sitar	(D) Sonometer

Question-4
Dogs have the ability to hear the sound of range :

(A) higher than 10kHz	(B) lower than 10kHz
(C) higher than 20kHz	(D) lower than 20kHz

Question-5
Reflection from a rough surface is called :

(A) Regular reflection	(B) Irregular reflection
(C) Multiple reflection	(D) Total internal reflection

Question-6
The angle in between the reflected ray and the normal drawn from the point of incidence is called :

(A) Angle of reflection	(B) Angle of incidence
(C) Angle of refraction	(D) Angle of contact

Question-7
The voice box of human being is called :

(A) Pharynx	(B) Vocal box
(C) Larynx	(D) Vocal chord

Question-8
A fruit appears to be bigger in a glass of water due to :

(A) Reflection	(B) Total internal reflection
(C) Defraction	(D) Refraction

Question-9
The principle behind the working of optical fiber is :

(A) Reflection	(B) Refraction
(C) Total internal reflection	(D) Multiple reflection

Question-10
In periscope mirrors are maintains at which angle?

(A) 90^o	(B) 0^o
(C) 45^o	(D) 60^o

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Std 8

Tamil Nadu (English Medium)

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