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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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Total Questions15
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Time Allowed20
ECAT Physics Chapter 20 Atomic Spectra
00:00
Question # 1
By CAT scans, we can detect the density difference of the order of:
Question # 2
The first series which was identified in the spectrum of hydrogen is called:
Question # 3
The photocopying process is called:
Question # 4
The life time of metastable state is equal to
Question # 5
Spectrum represents the number of component colours present in certain light in terms of:
Question # 6
An compared to solid matter, a crack or an air bubble allows:
Question # 7
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 8
Laser is a beam of:
Question # 9
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 10
X-ray are also known as
Question # 11
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 12
The spectrum emitted from hydrogen filled discharge tube is:
Question # 13
An electron of the hydrogen atom in the second orbit is called its:
Question # 14
The shell closer to the nucleus is called:
Question # 15
Tick the series which lie/s in. the infra-red region.
Top Scorers Of ECAT Physics Chapter 20 Atomic Spectra MCQ`s Test
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H Heer 07 - Jan - 2024 00 Min 36 Sec 60/60 -
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U Understand Islam Understand Islam 16 - Jul - 2024 00 Min 03 Sec 40/60 -
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M MusiCore 20 - Mar - 2023 04 Min 38 Sec 40/60
ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The natural arrangement of colours in the spectrum of white light spectrum is |
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
|
| 2 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 3 | Ultraviolet region lies in ______ series |
A. Layman
B. Balmer
C. P fund
D. B racket
|
| 4 | The electric field lines start from: |
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
|
| 5 | 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 |
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
|
| 6 | 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)
|
| 7 | 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
|
| 8 | Photons must have energy equal to |
A. ev
B. En
C. hf
D. None of these
|
| 9 | Balmer series lies in that region of electromagnetic wave spectrum which is called: |
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
|
| 10 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
Test Questions
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