ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

00:00
Question # 1

Tick the series which lies in the visible region:

Question # 2

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

Question # 3

The He-Ne laser discharge tube is filled with:

Question # 4

The value of the metastable state for Neon is

Question # 5

We can excite an atom by

Question # 6

Coulomb multiplied by volt by volt gives the unit called:

Question # 7

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

Question # 8

A metastable stae:

Question # 9

X-ray are also known as

Question # 10

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

Question # 11

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

Question # 12

Static electricity is produced by the transfer of:

Question # 13

Braking radiation causes:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
2 The holes created in the L and M shells are occupied by transitions of:
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
3 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
4 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
5 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
6 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
7 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
8 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
9 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
10 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

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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