CBSE Class 8 Science Some Natural Phenomena Assignment Set A

1.When two bodies are rubbed against each other,

(A) They acquire equal and opposite charges. (B) They acquire similar charges.

(C) One body acquire a charge and the other remains uncharged.

(D) They acquire different amount of charges.

2.A body is said to have positive charge when,

(A) When it has excess of electrons. (B) When it has lack of electrons.

(C) When it has equal protons and neutrons. (D) None of these.

3.When the glass rod is rubbed with silk, which charge isproduced on each of the rods?

(A) Glass rod - positive charge; silk - negative charge.

(B) Glass rod - negative charge; silk - positive charge.

(C) Glass rod - neutral; silk - negative charge.

(D) Glass rod - positive charge; silk - neutral.

4.Which of the statements are true?

(A) Like charges attract each other. (B) Like charges repel each other.

(C) Unlikecharges attract each other. (D) Unlikecharges repel each other.

5.An electron is

(A) Positively charged (B) Negatively charged (C) Neutral (D) None of the above.

6.The charges generated by rubbing are

(A) Static. B) Moving. C) Dynamic. D) None of the above.

7.Which instrument is used to check whether the body is charged or not?

(A) Telescope. (B) Lightning conductor. (C) Microscope. (D) Electroscope.

8.Charges flow from charged body to uncharged body.

(A) Until the entire charge flows from one part to the other. (B) Until they both carry the same charge.

(C) Until they both become uncharged. (D) Continuously

9.When an uncharged body touches a charged body, then

(A) Uncharged body acquires a similar charge (B) Uncharged body acquires an equal and opposite charge.

(C) Charge body loses it charge. (D) Uncharged body remains uncharged.

10.During the earthquake one should

(A) Use the lift to get out of the building one is in

(B) Crawl under the table and cover one's head.

(C) Crouch near a window and protect one's head.

(D) Stand on the porch or balcony.

11.Which device is used to protect a building from the effect of lightning?

(A) Lightning electroscope.

(B) Electroscope.

(C) Lightning insulator.

(D) Lightning conductor.

12.Which type of rod is used in lightning conductor?

(A) Non-metallic

(B) Insulator

(C) Metallic

(D) Semiconductor

13. The intensity of earthquake is measured on the

(A) Modify Mercalli Scale

(B) Richter scale

(C) Seismic scale

(D) Mercury scale

14. The point on the surface directly above the seismic focus is called the

(A) Hypocentre

(B) Epicentre

(C) Seismic centre

(D) focus

15. Earthing is

(A) Transferring of charge from charged body to earth.

(B) Transferring of charge from earth to charged body.

(C) Transferring of charge from charged body to uncharged body.

(D) Transferring of charge from uncharged body to charged body.

16. Air is

(A) Good conductor of electricity. (B) Bad conductor of electricity.

(C) Semiconductor of electricity. (D) None of the above.

17.Which one is the good conductor of electricity?

(A) Air

(B) Glass

(C) Copper

(D) Plastic

18. Which one is theexample of bad conductor?

(A) Copper

(B) Silver

(C) Air

(D) Gold

19. Which place is safe during lightning?

(A) Inside house.

(B) Under tree.

(C) Open place.

(D) Open vehicles.

20. Name the place where the major earthquakehad occurred on 26th January 2001.

(A) Uri

(B) Bhuj

(C) Tangdhar

(D) Latur

21. The uppermost layer of the earth is called

(A) The mental

(B) The inner-core

(C) The outer core

(D) The crust

22. The fragments of the crust are called

(A) The plate

(B) The plane

(C) The zone

(D) The danger zone

Please click the below link to access CBSE Class 8 Science Some Natural Phenomena Assignment Set A