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

Question # 2

Ultraviolet region lies in ______ series

Question # 3

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

Question # 4

X-ray are also known as

Question # 5

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

Question # 6

Selenium is:

Question # 7

The electric field lines start from:

Question # 8

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

Question # 9

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 # 10

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 11

The results of spectra obtained by Balmer were expressed in 1896 by:

Question # 12

The first series which was identified in the spectrum of hydrogen is called:

Question # 13

Tick the series which lies in the visible region:

Question # 14

The life time of metastable state is equal to

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
2 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
3 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
4 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)
5 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
6 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
7 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
8 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
9 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
10 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these

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