14. For which purpose seismograph is used?
(a) For predicting earthquakes(b) For recording earthquakes(c) For detecting and measuring earthquakes(d) All of these
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13. A light microscope uses lenses to make the objects look much bigger. What this increae in size is called?
(a) Magnification(b) Megafying(c) Both of these(d) None of these
12. Name the device that is used to measure the humidity.
(a) Hydrometer(b) Hygrometer(c) Galvanometer(d) Hexameter
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11. Hydrometer is the device that measures:
(a) The acidity of water(b) The specific gravity of a liquid(c) The gravity of milk(d) None of these
11. Hydrometer is the device that measures: Read More »
10. Which instrument is used to measure minute electrical currents?
(a) Electrometer(b) Galvanometer(c) Electric meter(d) None of these
10. Which instrument is used to measure minute electrical currents? Read More »
9. Sailors and other travellers used adevice to find close to the North and South geographic poles. How is known the device?
(a) Magnet(b) Compass(c) Pole meter(d) None of these
8. Who invented chronometer?
(a) John Harrison(b) Marconi(c) Dalton(d) None of these
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7. For which purpose instrument Centrifuge is used?
(a) To separate liquids(b) To separate mixtures of chemicals(c) To separate solids(d) None of these
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6. Which instrument is used to measure the pressure of air?
(a) Radio telescope(b) Barometer(c) Compass(d) Electrometer
6. Which instrument is used to measure the pressure of air? Read More »
5. Why ammeter is used?
(a) To measure acidity of water(b) To measure electric current(c) To measure pollution(d) None of these
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