ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

Try The MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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ECAT Physics Chapter 20 Atomic Spectra

00:00
Question # 1

The electric field lines start from:

Question # 2

The photocopying process is called:

Question # 3

We can excite an atom by

Question # 4

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

Question # 5

The range of wavelengths of colurs in the visible colours is

Question # 6

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

Question # 7

The value of the metastable state for Neon is

Question # 8

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

Question # 9

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 # 10

The inkjet printer eject a thin stream of:

Question # 11

Lyman series in the spectrum of hydrogen exists in the :

Question # 12

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

Question # 13

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

Question # 14

Gaussian surface is always:

Question # 15

The natural arrangement of colours in the spectrum of white light spectrum is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
2 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
3 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
4 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
5 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
6 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
7 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
8 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
9 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
10 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985

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