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Q.

Seismograph is an instrument used to:


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a

Record lightning

b

Record strength of wind

c

Record temperature

d

Record vibration of earthquakes 

answer is D.

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Detailed Solution

Concept: By turning the vibrations caused by seismic waves into electrical impulses, which we can subsequently show as seismograms on a computer screen, seismometers enable us to detect and monitor earthquakes. Seismologists research earthquakes and can utilise this information to pinpoint an earthquake's location and size.
 A device used for detecting earthquakes is called seismometer or Seismograph.
1-It also tells the intensity of the vibration of earthquakes and makes a graph of it .
2- Seismos means earthquakes and graphs means record or writing .
Hence, the correct option is 4.
 
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