Some Natural Phenomena

Some Natural Phenomena Worksheet-4

1. A negatively charged rod is brought close to two metal spheres which are in contact with each other, and the spheres are separated in the presence of the rod. Then

(a) the sphere close to the rod acquires a negative charge and the other sphere acquires a positive charge

(b) the sphere close to the rod acquires a positive charge and the other sphere acquires a negative charge

(c) both the spheres will acquire positive charge

(d) both the spheres will acquire negative charge

2. According to law of electrostatics

(a) a charged body attracts similar charged bodies but repels uncharged bodies.

(b) a charged body attracts the bodies carrying similar charge and repels the bodies possessing opposite charge

Some Natural Phenomena Worksheet-5

1. Interaction of charges is called

(a) Lightning                                 (b) Electrical discharges

(c) Earthing                                   (d) None to these

2. The shaking of earth is called

(a) Tsunami                                   (b) Volcano

(c) Earthquake                              (d) None of these

Some Natural Phenomena Worksheet-6

1. Which of the following scales are not linear in nature? (i) Decibel (ii) Richter (iii) Meter

(a) Decibel                                     (b) Richter &  Meter

(c) Richter                                      (d) Decibel & Richter

2. An earthquake is caused by

(a) Shaking of the earth's surface

(b) Tides in ocean

(c) The movement of earth's plate

(d) All of these