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

Graph of Black body radiation is example of

Question # 2

Braking radiation causes:

Question # 3

The results of spectra obtained by Balmer were expressed in 1896 by:

Question # 4

The electric field lines start from:

Question # 5

The value of the metastable state for Neon is

Question # 6

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

Question # 7

Photons must have energy equal to

Question # 8

The life time of metastable state is equal to

Question # 9

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

Question # 10

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 # 11

The process of formation of spectrum is called:

Question # 12

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

Question # 13

The first shell near the neucles is

Question # 14

The He-Ne laser discharge tube is filled with:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
2 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
3 In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
A. Helium
B. Neon
C. Both
D. None of these
4 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
5 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
6 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
7 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
8 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
9 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
10 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All

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