Physics Class 8
Revision Test
Max Marks:20
Q1 Name the force that acts during the process of Digestion and Respiration(a) Muscular Force
(c) Buoyant Force.
(b) Chemical Force
(d) No force is exerted
Q2 Who out of the following is not a visually impaired Indian who has great achievements to their credit(a) Diwakar.
(b) Ravindra
(C) Lal Advani.
(d) Bhaskar Dutta
Q3 Which of the following areas are not threatened of earthquakes in India(a) Indo-Gangetic Plane.
(b) Rann of Kutch
(C) Parts of Karnataka.
(d) None of these
Q4 Which of the following is not a non-optical aid?
(a) Visual Aids.
(C) Electronic Aids.
(b) Auditory Aids
(d) Telescopic Aids
Q5 Assertion- When charges move, they constitute an electric current.
Reason- The electric charges generated by rubbing are static.
Q6 Mention whether regular or diffused reflection will take place when a beam of light strikes against the following surfaces. Justify your answer in
each case1) Cardboard Surface.
2) Piece of Paper
Q7 What did Otto Von Guericke invent? What did he want to demonstrate?
Q8 Define Seismic Waves. Name any two causes of an Earthquake other than disturbances in the Earth’s Crust.
Q9 Write a short note on Net force.
OR
Define Non-Contact force. Differentiate between Frictional Force and Buoyant Force(2 points)
Q10 What is a seismograph? Explain its structure and mention two ways in which it helps scientists.
Q11 How are pictures seen in movies perceived as moving by the human eye?