ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

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 photocopying process is called:

Question # 2

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

Question # 3

X-ray are also known as

Question # 4

An electron of the hydrogen atom in the second orbit is called its:

Question # 5

We can excite an atom by

Question # 6

The He-Ne laser discharge tube is filled with:

Question # 7

Tick the series which lies in the visible region:

Question # 8

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

Question # 9

Braking radiation causes:

Question # 10

Gaussian surface is always:

Question # 11

The first shell near the neucles is

Question # 12

Ultraviolet region lies in ______ series

Question # 13

Balmer series was identified in:

Question # 14

The process of formation of spectrum is called:

Question # 15

CT scanning is the abbreviated name of

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
2 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
3 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
4 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
5 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
6 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
7 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
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 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
10 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell

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