By which of the following, magnitude of earthquake is measured?
A
Electroscope
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B
Richter scale
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C
Seismograph
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D
Coloumb
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Solution
The correct option is B Richter scale The Richter scale measures the magnitude of an earthquake (how powerful it is). It is measured using a machine called a seismometer which produces a seismograph. A Richter scale is normally numbered 1-10, though there is no upper limit.