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

Static electricity is produced by the transfer of:

Question # 2

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

Question # 3

Graph of Black body radiation is example of

Question # 4

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 # 5

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

Question # 6

The shell closer to the nucleus is called:

Question # 7

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

Question # 8

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

Question # 9

CT scanning is the abbreviated name of

Question # 10

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

Question # 11

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

Question # 12

Braking radiation causes:

Question # 13

We can excite an atom by

Question # 14

The results of spectra obtained by Blamer were expressed in 1896 by

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
2 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
3 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
4 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
5 The range of wavelengths of colurs in the visible colours is
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
6 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
7 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
8 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
9 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
10 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these

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