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

Graph of Black body radiation is example of

Question # 2

Braking radiation causes:

Question # 3

The photocopying process is called:

Question # 4

The He-Ne laser discharge tube is filled with:

Question # 5

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

Question # 6

Lyman series in the spectrum of hydrogen exists in the :

Question # 7

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 # 8

CT scanning is the abbreviated name of

Question # 9

Photons must have energy equal to

Question # 10

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 11

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

Question # 12

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 # 13

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

Question # 14

Gaussian surface is always:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
2 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)
3 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
4 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
5 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
6 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
7 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
8 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
9 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
10 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%

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