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

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

Question # 2

Black Body radiation spectrum is an example of:

Question # 3

The typical nuclei are less than:

Question # 4

Study of hydrogen visible spectrum in

Question # 5

For Holography we use

Question # 6

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

Question # 7

In Helium Neon laser, the discharge tube is filled with

Question # 8

The first orbit in the hydrogen atom has a radius.

Question # 9

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

Question # 10

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

Question # 11

Helium Neon Laser Beam emitted from discharge tube has a colour.

Question # 12

The first laser was built by

Question # 13

First spectral series of hydrogen atom was discovered by

Question # 14

The series in visible region is:

Question # 15

Boher proposed his atomic model in:

Question # 16

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

Question # 17

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

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The series in infrared region is:
A. Paschen series
B. Bracket series
C. Pfund series
D. All of above
2 When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as.
A. Photoelectric effect
B. Piezo electric effect
C. Thermionic emission
D. Secondary emission
3 Photons emitted in inner shell transition are.
A. Continuous X -rays
B. Discontinuous X rays
C. Characteristic X rays
D. Energetic X rays
4 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
5 Life time of metastable states is
A. 10-6 sec or more
B. 10-3 sec or more
C. 10-5 sec or more
D. None of these
6 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
7 The energy of 4th Orbit in hydrogen atom is.
A. -2.51 eV
B. -3.50 eV
C. -13.60 eV
D. -0.85 eV
8  Charge on an atom is:
A. Positive
B. Negative
C. Neutral
D. None of these
9 Balmer Empirical formula explains the electromagnetic radiation of any excited atom in terms of their.
A. Energy
B. Mass
C. Wave length
D. Momentum
10 The unit of Rh is.
A. ms-1
B. m
C. m2
D. m-1

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