Physics Atomic Spectra Test Online Preparation Mcqs

Physics Atomic Spectra Test Online Preparation Mcqs With Answers Start Below

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Question 1 of 15

1. Excited atoms return to their ground state in ________.
A.
B.
C.
D.

Question 1 of 15

Question 2 of 15

2. Electron cannot exist in the nucleus; it is confirmed by observing that _____.
A.
B.
C.
D.

Question 2 of 15

Question 3 of 15

3. Bracket series is obtained when all transitions of electron terminate on _______.
A.
B.
C.
D.

Question 3 of 15

Question 4 of 15

4. The velocity of laser light is ______.
A.
B.
C.
D.

Question 4 of 15

Question 5 of 15

5. Total number of series in hydrogen spectrum is
A.
B.
C.
D.

Question 5 of 15

Question 6 of 15

6. X-rays are similar in nature to _______.
A.
B.
C.
D.

Question 6 of 15

Question 7 of 15

7. A Balmer line is emitted when the electron in a hydrogen atom jumps from
A.
B.
C.
D.

Question 7 of 15

Question 8 of 15

8. In an electronic transition, atom cannot emit _____
A.
B.
C.
D.

Question 8 of 15

Question 9 of 15

9. In laser production, the state in which more atoms are in the upper state than in the lower one is called ______.
A.
B.
C.
D.

Question 9 of 15

Question 10 of 15

10. In an X-ray tube, electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is _______.
A.
B.
C.
D.

Question 10 of 15

Question 11 of 15

11. The metastable state for an atom in laser light is
A.
B.
C.
D.

Question 11 of 15

Question 12 of 15

12. The electric P.E of an electron in an orbit at a distance rn from the positive charge
A.
B.
C.
D.

Question 12 of 15

Question 13 of 15

13. X-rays are _________
A.
B.
C.
D.

Question 13 of 15

Question 14 of 15

14. Which one of the following postulate is in accordance with the Rutherford’s model?
A.
B.
C.
D.

Question 14 of 15

Question 15 of 15

15. Band spectrum is produced by:
A.
B.
C.
D.

Question 15 of 15


 

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