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

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

Question # 2

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 # 3

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

Question # 4

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

Question # 5

The natural arrangement of colours in the spectrum of white light spectrum is

Question # 6

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

Question # 7

The photocopying process is called:

Question # 8

Lyman series in the spectrum of hydrogen exists in the :

Question # 9

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

Question # 10

The inkjet printer eject a thin stream of:

Question # 11

X-ray are also known as

Question # 12

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

Question # 13

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

Question # 14

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

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 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)
2 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
3 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
4 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
5 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
6 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
7 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
8 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
9 The life time of metastable state is equal to
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
10 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

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