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

A metastable stae:

Question # 2

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

Question # 3

The life time of metastable state is equal to

Question # 4

Tick the series which lies in the visible region:

Question # 5

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

Question # 6

The results of spectra obtained by Blamer were expressed in 1896 by

Question # 7

Selenium is:

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Photons must have energy equal to

Question # 12

Coulomb multiplied by volt by volt gives the unit called:

Question # 13

CT scanning is the abbreviated name of

Question # 14

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

Question # 15

The shell closer to the nucleus is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
2 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
3 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
4 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
5 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
6 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
7 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
8 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
9 The holes created in the L and M shells are occupied by transitions of:
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
10 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape

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