ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Question # 1

The inkjet printer eject a thin stream of:

Question # 2

Balmer series was identified in:

Question # 3

Spectrum represents the number of component colours present in certain light in terms of:

Question # 4

The first series which was identified in the spectrum of hydrogen is called:

Question # 5

The lasing or active medium in He-Ne laser discharge tube is:

Question # 6

Graph of Black body radiation is example of

Question # 7

Laser is a beam of:

Question # 8

The life time of metastable state is equal to

Question # 9

The results of spectra obtained by Balmer were expressed in 1896 by:

Question # 10

Static electricity is produced by the transfer of:

Question # 11

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 12

The spectrum emitted from hydrogen filled discharge tube is:

Question # 13

The value of the metastable state for Neon is

Question # 14

An compared to solid matter, a crack or an air bubble allows:

Question # 15

X-rays can penetrate in a solid matte through a distance of several:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
2 Energy required by an electron revolving in certain orbit to jump to an excited state is called:
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential
3 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
4 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
5 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
6 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
7 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
8 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
9 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
10 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true

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