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

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

Question # 2

We can excite an atom by

Question # 3

The He-Ne laser discharge tube is filled with:

Question # 4

The first shell near the neucles is

Question # 5

Balmer series was identified in:

Question # 6

The range of wavelengths of colurs in the visible colours is

Question # 7

An electron of the hydrogen atom in the second orbit is called its:

Question # 8

Braking radiation causes:

Question # 9

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

Question # 10

The electric field lines start from:

Question # 11

CT scanning is the abbreviated name of

Question # 12

If the distance between two charges is doubled,the force between them will become:

Question # 13

The value of the metastable state for Neon is

Question # 14

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

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 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
2 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
3 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
4 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
5 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
6 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
7 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
8 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
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 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms

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