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

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

Question # 2

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

Question # 3

Ultraviolet region lies in ______ series

Question # 4

The shell closer to the nucleus is called:

Question # 5

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

Question # 6

The range of wavelengths of colurs in the visible colours is

Question # 7

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

Question # 8

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

Question # 9

X-ray are also known as

Question # 10

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

Question # 11

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

Question # 12

The first shell near the neucles is

Question # 13

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

Question # 14

The electric field lines start from:

Question # 15

The spectrum emitted from hydrogen filled discharge tube is:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
2 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
3 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
4 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
5 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
6 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
7 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
8 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
9 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
10 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)

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