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

Paschen series lies in the

Question # 2

First spectral series of hydrogen atom was discovered by

Question # 3

Boher proposed his atomic model in:

Question # 4

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

Question # 5

We can find from de Broglie formula

Question # 6

Balmer Empirical formula explains the electromagnetic radiation of any excited atom in terms of their.

Question # 7

Kx -Xrays are produced due to transition of electron from.

Question # 8

An atom can reside in excited state for

Question # 9

Laser can be made by creating.

Question # 10

Earth orbital speed is

Question # 11

The typical nuclei are less than:

Question # 12

Study of hydrogen visible spectrum in

Question # 13

In Helium Neon laser, discharge tube is filled with Neon gas.

Question # 14

Hydrogen atom spectrum does not lie in

Question # 15

Radius of first Bohr's orbit is.

Question # 16

In according with Bohr's theory the K.E of the electron is equal to:

Question # 17

Frequency of x-rays depends upon.

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The first laser was built by
A. ArthursSchawalow
B. T.H.Maiman
C. Peter Sorokin
D. C.H.Townes
2 The shortest wave length is Bracket series has wave length.
A. 16/Rn
B. Rn/16
C. 16 Rn
D. 4 Rn
3 The value of Rydberg constant is:
A. 1.0749x107m-1
B. 1.0974 x 107 m-1
C. 1.974 x106m-1
D. 1.0974 x 10-7 m-1
4 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
5 Which of the following series of hydrogen spectrum lies in ultra violet region.
A. Lyman sereis
B. Paschen series
C. Balmar series
D. Bracket series
6 The longest wavelength of Paschen series is.
A. 656 nm
B. 1094 nm
C. 1875 nm
D. 2000 nm
7 When an electron in an atom goes from a lower to higher orbit its:
A. K.E increases , P.E decreases
B. K.E increases , P.E increases
C. K.E decreases , P.E increases
D. K.E decreases , P.E decreases
8 Radius of first Bohr's orbit is.
A. 0.053 nm
B. 0.053 mm
C. 0.053 micro meter
D. 0.053 m
9 Target material used in x-rays tube have following properties.
A. High atomic number and high melting pouint
B. High atomic number and low melting pouint
C. Low atomic number and low melting pouint
D. High atomic number only
10 Photons emitted in inner shell transition are.
A. Continuous X -rays
B. Discontinuous X rays
C. Characteristic X rays
D. Energetic X rays

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