Some Natural Phenomena Worksheet-1

Some Natural Phenomena Worksheet-1

1. The force present between two charged bodies is:

(a) electrostatic force                  (b) electromagnetic force

(c) gravitational force                 (d) frictional force

2. When two bodies are rubbed against each other:

(a) they acquire equal and similar charges

(b) they acquire equal and opposite charges

(c) they acquire different charges but in different amounts depending upon their masses

(d) they do not acquire any charge

3. Suppose you are in a car and it is raining heavily with thunderstorms. Then what is the best way to protect yourself from a possible thunder storm fall?

(a) Remain in the car

(b) Get out of the car and take cover under the car

(c) Run to a nearby tree

(d) Get out and stand under an electric pole

4. Electric charge is measured in:

(a) Coulombs    (b) Amperes      (c) Volts             (d) Watts

5. An ebonite rod rubbed with fur and a glass rod rubbed with silk cloth are brought nearer to each other. Then:

(a) they will attract each other

(b) they will repel each other

(c) nothing will happen to them

(d) they will get heated up

6. When a glass rod is rubbed with silk cloth, it acquires positive charge because:

(a) electrons are added to it

(b) electrons are removed from it

(c) protons are added to it

(d) protons are removed from it

7. Electroscope is used:

(a) to detect and test small electric charges

(b) to calculate the amount of electric charge flowing through the conductor in the given interval of time

(c) to find out the presence of antimatter

(d) to test the presence of magnetic field

8. A lightning conductor installed in a building:

(a) does not allow the lightning to fall on the building

(b) repels the lightning

(c) forces the lightning to fall in an area where there are no buildings

(d) conducts electric charge to the ground when lightning strikes the building

9. Lightning rods are made of:

(a) Copper         (b) Plastic          (c) Bakelite        (d) sand paper

10. When you touch a charged body, the charge flows through you into the earth. This is called

(a) Induction                                 (b) Conduction

(c) Capacitance                             (d) Earthing

Answer Key:

(1)-(a); (2)-(b); (3)-(a); (4)-(a); (5)-(a); (6)-(b); (7)-(a); (8)-(d); (9)-(a); (10)-(d)