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

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 # 2

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

Question # 3

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

Question # 4

An compared to solid matter, a crack or an air bubble allows:

Question # 5

Laser is a beam of:

Question # 6

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

Question # 7

The inkjet printer eject a thin stream of:

Question # 8

Coulomb multiplied by volt by volt gives the unit called:

Question # 9

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

Question # 10

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

Question # 11

The He-Ne laser discharge tube is filled with:

Question # 12

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

Question # 13

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

Question # 14

The photocopying process is called:

Question # 15

Gaussian surface is always:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
2 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
3 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
4 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
5 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
6 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
7 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
8 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
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
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
10 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above

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