Physics Quiz General Knowledge part 12

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Physics Quiz General Knowledge part 12

Physics Quiz

For complete Physics Quiz, please refer History of PhysicsAtomic Structure QuizPhysics Questions Uses of Measuring and Other Instruments, Physics Work Power and Energy QuizInventions in Physics

Physics Quiz Questions Part 1 – General Knowledge

 

1. Who was the first to suggest this idea “Radiant energy can be emitted and absorbed by atoms only in discrete amounts called ‘quanta’ ”?

Max Planck

 

2. Who first contemplated “the speed of tight is the same no matter how it is measured”?

Albert Einstein

 

3. Who was the first to suggest that matter and energy are inter changeable?

Albert Einstein

 

4. Who first formulated the idea that ‘a moving rod contracts in the direction of its motion’?

Lorentz and Fitzgerald independently

 

5. Who first proposed the concept of atomic number?

Henry Moseley

 

6. Who, in 1829, was the first scientist to suggest that the spectral line should be used as a standard of length?

Jacques Babinet

 

7. Who formulated the idea ‘the farther away a galaxy is, the faster it is moving’?

Edwin Hubble

 

8. Who gave the idea, “the light in proceeding from point to point travels along the route which minimizes file time required”?

Pierre de Fermat

 

9. Who was the first to think, “The period of oscillation of a pendulum is independent of its amplitude”?

Galileo

 

10. Who was the first to give the idea, “Each pure substance has its own characteristic spectrum”?

Gustav Kirchhoff

 

Physics Quiz – General Knowledge Part – 2

 

11. Who was first to think about “A pivoted magnetic needle placed parallel to a wire carrying an electric current makes oscillation”?

Hans Christian Oersted

 

12. Who was first to suggest “A planet moves most quickly when it is closest to the sun, but slows down as it moves farther away”?

Johannes Kepler

 

13. “Regular strokes of the pendulum could be utilized in the accurate measurement of time”

Who was the first to advance this idea?

Galileo Galilee

 

14. 8 Nov. 1895 is an important date in the history of physics. What is it?

Roentgen discovered the X-rays

 

15. In 1752, Benjamin Franklin conducted the famous kite experiment. What did it suggest?

Lightning is a form of electricity

 

16. In which year did Luigi Galvani discover, albeit accidently, the action of electricity on the muscles of a dissected frog?

1771

 

17. What is the important event which took place in 1665?

The discovery of Newtonian laws of gravitation

 

18. For given value of n, what is the maximum number of electrons in an orbit?

2n2

 

19. What is the speed of an electron in the orbit of hydrogen atom in the ground state?

C/137

 

20. Which is the best laboratory approximation to an ideal black body?

A hollow enclosure blackened inside with soot and having a small hole

 

Physics Quiz Answers Part  3 – General Knowledge

 

21. From where fraunhofer, lines are observed in the spectrum?

The sun

 

22. Why is the fraunhofer lines present in the spectrum?

Vapors of elements present in atmosphere absorb certain colors

 

23. Write an example of sources that give discrete emission spectrum:

Mercury Vapor lamp

 

24. Which is the longest wavelength?

Infra-red radiation

 

25. Light from a distant star is examined with a spectroscope. What does the spectrum show?

Temperature of star

 

26. From where Band spectrum is obtained?

Molecules In the gaseous state of matter

 

27. Which type of spectra is produced in a candle flame, an electric bulb and a kerosene oil lamp?

Continuous spectra

 

28. In which color, wavelength of 5450 A0 occurs?

Green

 

29. What is the velocity of an electron in ground state?

2 x 106m/s

 

30. The energy of an electron in the first orbit of hydrogen atom is -13.6 ev. What is the energy of the electron in the fourth orbit?

-0.85 ev.

 

Read 118 Physics Questions Answers

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