ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

Try The MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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ECAT Physics Chapter 20 Atomic Spectra

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Question # 1

The photocopying process is called:

Question # 2

Ultraviolet region lies in ______ series

Question # 3

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

Question # 4

Laser is a beam of:

Question # 5

CT scanning is the abbreviated name of

Question # 6

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 7

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

Question # 8

We can excite an atom by

Question # 9

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

Question # 10

The spectrum emitted from hydrogen filled discharge tube is:

Question # 11

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

Question # 12

Lyman series in the spectrum of hydrogen exists in the :

Question # 13

Braking radiation causes:

Question # 14

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

Question # 15

Tick the series which lies in the visible region:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
2 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
3 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
4 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
5 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
6 Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
7 A metastable stae:
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second
8 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
9 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
10 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon

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