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

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Question # 1

Braking radiation causes:

Question # 2

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 # 3

CT scanning is the abbreviated name of

Question # 4

Tick the series which lies in the visible region:

Question # 5

Lyman series in the spectrum of hydrogen exists in the :

Question # 6

The shell closer to the nucleus is called:

Question # 7

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

Question # 8

Balmer series was identified in:

Question # 9

The electric field lines start from:

Question # 10

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

Question # 11

A metastable stae:

Question # 12

The inkjet printer eject a thin stream of:

Question # 13

The life time of metastable state is equal to

Question # 14

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 # 15

The spectrum emitted from hydrogen filled discharge tube is:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
2 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
3 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
4 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
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 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
7 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
8 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
9 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
10 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

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