Physics Questions Set 3

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Physics Questions

Physics Questions Set 3

1. The Element of an electric heater is made of Nichrome .

2. Iron is the metal commonly used for making an electromagnet .

3. Einstein got the Nobel prize for- Photoelectric effect .

4. One Mega watt hour (MWH) is equal to 3.6 × 109 joule .

5. The Period of revolution round the sun is maximum by Mars .

6. Persistence of vision is the principle behind Cinema .

7. When water is heated from 0℃ to 100℃, the volume of water First decrease , then increase .

8. Ampere-hour is the unit of – Amount of charge .

9. We can convert a Galvanometer into a voltmeter by using- High resistance in series.

10. Gas law was given by- Boyle .

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11. At 4℃ temperature the density of water will be maximum.

12. Temperature at which temperature on Celsius and Fahrenheit scales equal= – 40℃.

13. Kilowatt – hour is a unit of Power.

14. Fire in the diesel engine is produced by – Compression .

15. The ozone layer protects us from – Ultra violet rays (UV Rays).

16. Silver is the best conductor of electricity among Copper, Gold, Silver.

17. Roentgen discovered X-Rays .

18. With an increase in pressure the melting point of max will- Increase.

19. Red, Green, Blue are primary colors .

20. Light from the laser is Monochromatic .

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