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 first shell near the neucles is

Question # 2

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

Question # 3

The photocopying process is called:

Question # 4

Coulomb multiplied by volt by volt gives the unit called:

Question # 5

Lyman series in the spectrum of hydrogen exists in the :

Question # 6

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

Question # 7

Selenium is:

Question # 8

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

Question # 9

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

Question # 10

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 11

Spectrum represents the number of component colours present in certain light in terms of:

Question # 12

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

Question # 13

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

Question # 14

The spectrum emitted from hydrogen filled discharge tube is:

Question # 15

Graph of Black body radiation is example of

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
2 The holes created in the L and M shells are occupied by transitions of:
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
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 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
5 In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
A. Short wavelength
B. Large wavelength
C. Very large wavelenth
D. Low frequency
6 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
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 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
10 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor

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