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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
Ultraviolet region lies in ______ series
Question # 2
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 3
The holes created in the L and M shells are occupied by transitions of:
Question # 4
Spectrum represents the number of component colours present in certain light in terms of:
Question # 5
Laser is a beam of:
Question # 6
The life time of metastable state is equal to
Question # 7
The first series which was identified in the spectrum of hydrogen is called:
Question # 8
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 9
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 # 10
The spectrum emitted from hydrogen filled discharge tube is:
Question # 11
By CAT scans, we can detect the density difference of the order of:
Question # 12
The electric field lines start from:
Question # 13
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 14
X-ray are also known as
Question # 15
Balmer series was identified in:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Static electricity is produced by the transfer of: |
A. Electrons
B. Protons
C. One fluid
D. Two fluid
|
| 2 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 3 | If the distance between two charges is doubled,the force between them will become: |
A. Double
B. Half
C. One third
D. One fourth
|
| 4 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
| 5 | Laser is a beam of: |
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
|
| 6 | Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons |
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
|
| 7 | 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
|
| 8 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 9 | A metastable stae: |
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second
|
| 10 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
Test Questions