Second Year Physics Chapter 20 Online MCQ Test for 2nd Year Physics Chapter 20 Atomic Spectra Preparation

FSC Part 2 Physics
Chapter 20 Test

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Physics FSC Part 2 Chapter 20 Online MCQ's Test

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Question # 1

Which is not characteristic of Laser.

Question # 2

The shortest wave length is Bracket series has wave length.

Question # 3

Helium-Neon laser discharge tube contains neon

Question # 4

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

Question # 5

Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.

Question # 6

For an atom of hydrogen atom the radius of the first orbit is given by:

Question # 7

The X-rays diffraction with crystal was first studied by

Question # 8

Which is not true for X rays

Question # 9

The first orbit in the hydrogen atom has a radius.

Question # 10

Earth orbital speed is

Question # 11

The idea of laser device was first introduced by C.H. Towners and Authers Schowlan is

Question # 12

X- ray diffraction reveals that these are

Question # 13

For Paschen series, the value of 'n' starts from

Question # 14

Black Body radiation spectrum is an example of:

Question # 15

Target material used in x-rays tube have following properties.

Question # 16

First spectral series of hydrogen atom was discovered by

Question # 17

An electron in H -atom is excited from ground state n=4 , How many spectral lines are possible in this case.

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FSC Part 2 Physics Chapter 20 Online Test MCQ's

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Black Body radiation spectrum is an example of:
A. Atomic spectra
B. Line spectra
C. Continuous spectra
D. None of above
2 Bremsstrahlung radiation are examples of
A. Atomic spectra
B. Molecular spectra
C. Continuous spectra
D. Discrete spectra
3 1 rad =
A. 0.001Gy
B. 0.01Gy
C. 0.1Gy
D. 1.01Gy
4 In according with Bohr's theory the K.E of the electron is equal to:
A. ke2/2r
B. Ze2/r
C. Ze2/r2
D. Ze2/2r2
5 Which series lies in the ultraviolet region.
A. Balmer series
B. Bracket series
C. Ptund series
D. Lyman series
6 The value of Rydberg constant is
A. 1.0974 x 107 m-1
B. 1.0974 x 10-7 m-1
C. 1.0974 x 106 m-1
D. 1.0974 x 10-6 m-1
7 The process by which lesser beam can be used to generate 3-dimensional images of objects is called
A. Holography
B. Geo graphy
C. Tomography
D. Radio graphy
8 X-rays were discovered by
A. Curie
B. Henry Becquerel
C. Rontgen
D. None of these
9 Production of x rays is reverse process of
A. Photo electric effect
B. Compton effect
C. An nihilation
D. Pair production
10 The first orbit in the hydrogen atom has a radius.
A. 0.53 nm
B. 0.053 nm
C. 0.0053 nm
D. 0.00053 nm

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