ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

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

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

Question # 2

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

Question # 3

CT scanning is the abbreviated name of

Question # 4

Ultraviolet region lies in ______ series

Question # 5

The inkjet printer eject a thin stream of:

Question # 6

The He-Ne laser discharge tube is filled with:

Question # 7

Braking radiation causes:

Question # 8

Coulomb multiplied by volt by volt gives the unit called:

Question # 9

The first shell near the neucles is

Question # 10

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

Question # 11

Gaussian surface is always:

Question # 12

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

Question # 13

Graph of Black body radiation is example of

Question # 14

Selenium is:

Question # 15

X-ray are also known as

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
2 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
3 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
4 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
5 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
8 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
9 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
10 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these

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