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

We can excite an atom by

Question # 2

Selenium is:

Question # 3

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

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

The process of formation of spectrum is called:

Question # 6

CT scanning is the abbreviated name of

Question # 7

Lyman series in the spectrum of hydrogen exists in the :

Question # 8

The value of the metastable state for Neon is

Question # 9

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

Question # 10

Tick the series which lie/s in. the infra-red region.

Question # 11

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

Question # 12

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 13

The first series which was identified in the spectrum of hydrogen is called:

Question # 14

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

Question # 15

X-ray are also known as

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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 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
3 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
4 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
5 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
6 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
7 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
8 In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
A. Helium
B. Neon
C. Both
D. None of these
9 The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
A.
one
B. two
C. three
D. four
10 Energy required by an electron revolving in certain orbit to jump to an excited state is called:
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential

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