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

In an electronic transition atom cannot emit.

Question # 2

We can find from de Broglie formula

Question # 3

The velocity of electron moving is 1st orbit of hydrogen atom is:

Question # 4

1 rad =

Question # 5

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 # 6

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

Question # 7

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

Question # 8

The energy of 4th Orbit in hydrogen atom is.

Question # 9

X-rays were discovered by

Question # 10

The 1st Bohr atom in the hydrogen atom has radius

Question # 11

When an electron in an atom goes from a lower to higher orbit its:

Question # 12

The typical nuclei are less than:

Question # 13

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

Question # 14

Laser is a device which can produce:

Question # 15

Charge on positron is:

Question # 16

First spectral series of hydrogen atom was discovered by

Question # 17

1 rem =

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Balmer series lies in region of electromagnetic spectrum.
A. Infrared
B. Visible
C. Ultraviolet
D. Fra infrared
2 The idea of laser device was first introduced by C.H. Towners and Authers Schowlan is
A. 1972
B. 1965
C. 1958
D. 1913
3 The longest wavelength of Paschen series is.
A. 656 nm
B. 1094 nm
C. 1875 nm
D. 2000 nm
4 Energy produced due to fission of uranium atom is:
A. 500MeV
B. 200MeV
C. 700MeV
D. 750MEV
5 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
6 The unit of Rh is.
A. ms-1
B. m
C. m2
D. m-1
7 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
8 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
9 The 1st Bohr atom in the hydrogen atom has radius
A. 3.56 x 10-10 m
B. 0.053 x 10-11 m
C. 0.53 x 10-11 m
D. 5.30 x 10-11 m
10 1 rad =
A. 0.001Gy
B. 0.01Gy
C. 0.1Gy
D. 1.01Gy

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