ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

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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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Question # 1

By CAT scans, we can detect the density difference of the order of:

Question # 2

The He-Ne laser discharge tube is filled with:

Question # 3

The shell closer to the nucleus is called:

Question # 4

The process of formation of spectrum is called:

Question # 5

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 6

CT scanning is the abbreviated name of

Question # 7

Spectrum represents the number of component colours present in certain light in terms of:

Question # 8

Balmer series was identified in:

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 range of wavelengths of colurs in the visible colours is

Question # 11

The inkjet printer eject a thin stream of:

Question # 12

We can excite an atom by

Question # 13

The lasing or active medium in He-Ne laser discharge tube is:

Question # 14

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 15

The results of spectra obtained by Blamer were expressed in 1896 by

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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 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
3 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
4 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
5 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
8 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
9 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
10 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series

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