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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
00:00
Question # 1
The shell closer to the nucleus is called:
Question # 2
The electric field lines start from:
Question # 3
Balmer series was identified in:
Question # 4
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
Question # 5
We can excite an atom by
Question # 6
Ultraviolet region lies in ______ series
Question # 7
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 8
The photocopying process is called:
Question # 9
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 10
By CAT scans, we can detect the density difference of the order of:
Question # 11
The lasing or active medium in He-Ne laser discharge tube is:
Question # 12
The spectrum emitted from hydrogen filled discharge tube is:
Question # 13
Coulomb multiplied by volt by volt gives the unit called:
Question # 14
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 15
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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)
|
| 2 | 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
|
| 3 | 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
|
| 4 | The photocopying process is called: |
A. Geography
B. Sonography
C. Xerography
D. Zerography
|
| 5 | The life time of metastable state is equal to |
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
|
| 6 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 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 | The shell closer to the nucleus is called: |
A. N shell
B.
L shell
C. K shell
D. M shell
|
| 9 | Coulomb multiplied by volt by volt gives the unit called: |
A. farad
B. Ohm
C. Second
D. joule
|
| 10 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.