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

We can excite an atom by

Question # 2

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

Question # 3

The natural arrangement of colours in the spectrum of white light spectrum is

Question # 4

The shell closer to the nucleus is called:

Question # 5

Photons must have energy equal to

Question # 6

By CAT scans, we can detect the density difference of the order of:

Question # 7

The first shell near the neucles is

Question # 8

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

Question # 9

Gaussian surface is always:

Question # 10

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

Question # 11

The range of wavelengths of colurs in the visible colours is

Question # 12

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

Question # 13

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 14

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

Question # 15

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

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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 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
3 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
4 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
5 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
6 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
7 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
8 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
9 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
10 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%

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