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

Question # 2

Selenium is:

Question # 3

The first shell near the neucles is

Question # 4

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 # 5

The inkjet printer eject a thin stream of:

Question # 6

The spectrum emitted from hydrogen filled discharge tube is:

Question # 7

The value of the metastable state for Neon is

Question # 8

Tick the series which lies in the visible region:

Question # 9

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Question # 10

Ultraviolet region lies in ______ series

Question # 11

A metastable stae:

Question # 12

The photocopying process is called:

Question # 13

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
2 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
3 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
4 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
5 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
6 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
7 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
8 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
9 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
10 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket

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