Q57 of 84 Page 290

An earthquake of magnitude 2 on Richter scale is:

The magnitude (or intensity) of an earthquake is expressed in terms of Richter scale. The destructive earthquakes have magnitudes higher than 7 on the Richter scale.

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55

A plastic comb is rubbed with dry hair whereas a glass rod is rubbed with a piece of silk cloth. Which of these will get negatively charged?

A) Plastic comb


B) Glass rod


C) Dry hair


D) Silk cloth

 56

The magnitude of an earthquake is measured on:

 58

The epicentre of an earthquake is:

 59

The waves generated by the earthquake tremors are called: