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 electric field lines start from:

Question # 2

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

Question # 3

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

Question # 4

Spectrum represents the number of component colours present in certain light in terms of:

Question # 5

Gaussian surface is always:

Question # 6

X-ray are also known as

Question # 7

The process of formation of spectrum is called:

Question # 8

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

Question # 9

CT scanning is the abbreviated name of

Question # 10

Laser is a beam of:

Question # 11

Selenium is:

Question # 12

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

Question # 13

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

Question # 14

Braking radiation causes:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
4 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
5 The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
A.
one
B. two
C. three
D. four
6 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
7 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
8 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
9 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
10 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule

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