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

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 # 2

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

Question # 3

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

Question # 4

The holes created in the L and M shells are occupied by transitions of:

Question # 5

Braking radiation causes:

Question # 6

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

Question # 7

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

Question # 8

Coulomb multiplied by volt by volt gives the unit called:

Question # 9

The value of the metastable state for Neon is

Question # 10

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

Question # 11

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

Question # 12

Graph of Black body radiation is example of

Question # 13

Tick the series which lies in the visible region:

Question # 14

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

Question # 15

Lyman series in the spectrum of hydrogen exists in the :

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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 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
4 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
5 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
6 A metastable stae:
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second
7 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
8 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
9 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
10 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV

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