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

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Question # 1

The value of the metastable state for Neon is

Question # 2

Tick the series which lies in the visible region:

Question # 3

The first shell near the neucles is

Question # 4

Coulomb multiplied by volt by volt gives the unit called:

Question # 5

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

Question # 6

Gaussian surface is always:

Question # 7

The inkjet printer eject a thin stream of:

Question # 8

Ultraviolet region lies in ______ series

Question # 9

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

Question # 10

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Question # 11

A metastable stae:

Question # 12

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

Question # 13

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

Question # 14

X-rays can penetrate in a solid matte through a distance of several:

Question # 15

The range of wavelengths of colurs in the visible colours is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
2 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
3 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
4 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
5 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
6 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
7 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
8 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
9 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
10 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)

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