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 spectrum emitted from hydrogen filled discharge tube is:

Question # 2

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

Question # 3

An electron of the hydrogen atom in the second orbit is called its:

Question # 4

The range of wavelengths of colurs in the visible colours is

Question # 5

Graph of Black body radiation is example of

Question # 6

The results of spectra obtained by Blamer were expressed in 1896 by

Question # 7

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

Question # 8

Static electricity is produced by the transfer of:

Question # 9

Braking radiation causes:

Question # 10

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

Question # 11

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

Question # 12

The shell closer to the nucleus is called:

Question # 13

X-ray are also known as

Question # 14

The process of formation of spectrum is called:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
2 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)
3 The range of wavelengths of colurs in the visible colours is
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
5 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
6 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
7 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
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 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
10 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

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