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

Gaussian surface is always:

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

The range of wavelengths of colurs in the visible colours is

Question # 4

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 5

The process of formation of spectrum is called:

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Balmer series was identified in:

Question # 10

Selenium is:

Question # 11

We can excite an atom by

Question # 12

Tick the series which lies in the visible region:

Question # 13

Photons must have energy equal to

Question # 14

A metastable stae:

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 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
2 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
3 The life time of metastable state is equal to
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
4 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
5 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
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 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
10 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

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