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

00:00
Question # 1

CT scanning is the abbreviated name of

Question # 2

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

Question # 3

The first shell near the neucles is

Question # 4

The photocopying process is called:

Question # 5

The range of wavelengths of colurs in the visible colours is

Question # 6

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

Question # 7

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

Question # 8

The spectrum emitted from hydrogen filled discharge tube is:

Question # 9

Tick the series which lies in the visible region:

Question # 10

The electric field lines start from:

Question # 11

Ultraviolet region lies in ______ series

Question # 12

If the distance between two charges is doubled,the force between them will become:

Question # 13

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

Question # 14

The value of the metastable state for Neon is

Question # 15

Coulomb multiplied by volt by volt gives the unit called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 An compared to solid matter, a crack or an air bubble allows:
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
2 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
3 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
4 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
5 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
8 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
9 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
10 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985

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