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

Tick the series which lies in the visible region:

Question # 2

The value of the metastable state for Neon is

Question # 3

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

Question # 4

The process of formation of spectrum is called:

Question # 5

The electric field lines start from:

Question # 6

The inkjet printer eject a thin stream of:

Question # 7

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

Question # 8

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

Question # 9

Braking radiation causes:

Question # 10

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

Question # 11

Gaussian surface is always:

Question # 12

We can excite an atom by

Question # 13

Laser is a beam of:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
2 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
3 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
4 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
5 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
6 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
7 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
8 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
9 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
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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