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 electric field lines start from:

Question # 2

The value of the metastable state for Neon is

Question # 3

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

Question # 4

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

Question # 5

The life time of metastable state is equal to

Question # 6

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

Question # 7

An compared to solid matter, a crack or an air bubble allows:

Question # 8

The shell closer to the nucleus is called:

Question # 9

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 # 10

Braking radiation causes:

Question # 11

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

Question # 12

Tick the series which lies in the visible region:

Question # 13

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

Question # 14

Energy required by an electron revolving in certain orbit to jump to an excited state 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 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
2 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
3 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
4 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
5 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
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 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
8 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)
9 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
10 The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
A.
one
B. two
C. three
D. four

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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