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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 process of formation of spectrum is called:
Question # 2
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
Question # 3
The photocopying process is called:
Question # 4
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 5
Braking radiation causes:
Question # 6
The holes created in the L and M shells are occupied by transitions of:
Question # 7
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 8
The electric field lines start from:
Question # 9
Tick the series which lie/s in. the infra-red region.
Question # 10
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 # 11
Tick the series which lies in the visible region:
Question # 12
The life time of metastable state is equal to
Question # 13
The first series which was identified in the spectrum of hydrogen is called:
Question # 14
Static electricity is produced by the transfer of:
Question # 15
The shell closer to the nucleus is called:
Top Scorers Of Physics ECAT Pre Engineering Chapter 20 Atomic Spectra MCQ`s Test
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A Arian Ahmed 12 - Mar - 2024 00 Min 03 Sec 60/60 -
F Farzand Shah Farzand Shah 01 - Jun - 2024 00 Min 44 Sec 60/60 -
S suzi 11 - Feb - 2026 00 Min 45 Sec 60/60 -
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A Ayesha Ch 06 - Mar - 2024 01 Min 33 Sec 50/60 -
M m imran 18 - May - 2024 02 Min 16 Sec 50/60 -
C Computer mail 28 - Apr - 2026 03 Min 26 Sec 48/60
ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The range of wavelengths of colurs in the visible colours is |
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
|
| 2 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 3 | Static electricity is produced by the transfer of: |
A. Electrons
B. Protons
C. One fluid
D. Two fluid
|
| 4 | The inkjet printer eject a thin stream of: |
A. Water
B. Oil
C. Ink
D. Any above
|
| 5 | The natural arrangement of colours in the spectrum of white light spectrum is |
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
|
| 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 holes created in the L and M shells are occupied by transitions of: |
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
|
| 8 | 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
|
| 9 | X-ray are also known as |
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
|
| 10 | Gaussian surface is always: |
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.