ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

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

Try The 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

Tick the series which lie/s in. the infra-red region.

Question # 2

The holes created in the L and M shells are occupied by transitions of:

Question # 3

The photocopying process is called:

Question # 4

Photons must have energy equal to

Question # 5

Braking radiation causes:

Question # 6

The life time of metastable state is equal to

Question # 7

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

Question # 8

Static electricity is produced by the transfer of:

Question # 9

The electric field lines start from:

Question # 10

A metastable stae:

Question # 11

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

Question # 12

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

Question # 13

Selenium is:

Question # 14

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
2 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
3 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
4 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
5 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
6 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
7 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
8 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
9 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
10 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)

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