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MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
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Question # 1
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 # 2
Tick the series which lie/s in. the infra-red region.
Question # 3
Ultraviolet region lies in ______ series
Question # 4
The holes created in the L and M shells are occupied by transitions of:
Question # 5
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 6
Gaussian surface is always:
Question # 7
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 8
X-ray are also known as
Question # 9
Braking radiation causes:
Question # 10
CT scanning is the abbreviated name of
Question # 11
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 12
Coulomb multiplied by volt by volt gives the unit called:
Question # 13
Spectrum represents the number of component colours present in certain light in terms of:
Question # 14
Selenium is:
Question # 15
The electric field lines start from:
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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 | An electron of the hydrogen atom in the second orbit is called its: |
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
|
| 3 | The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is |
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
|
| 4 | Gaussian surface is always: |
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
|
| 5 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
| 6 | An compared to solid matter, a crack or an air bubble allows: |
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
|
| 7 | 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
|
| 8 | Tick the series which lie/s in. the infra-red region. |
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
|
| 9 | X-rays produced in a tube operating at 105V. The speed of X-rays produced is |
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
|
| 10 | The photocopying process is called: |
A. Geography
B. Sonography
C. Xerography
D. Zerography
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.