The instrument for measuring intensity of earthquakes is called
1). Ideograph
2). Pantograph
3). Ergo graph
4). Seismograph
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2. An athlete runs before long jump to get advantage on
3. Heat from the sun reaches earth by the process of
4. ?In the nuclear reactors, moderators are used to
5. Which of the following pairs of physical quantities have the same dimensions?
6. A fountain pen works on the principle of
7. The distance between node and adjacent antinode is 30 cm. The wavelength is
8. Which of the following is optical illusion
9. The owl can see most clearly in total darkness because
10. Which of the following is the unit of electric current ?