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

A metastable stae:

Question # 3

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

Question # 4

Graph of Black body radiation is example of

Question # 5

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

Question # 6

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

Question # 7

Braking radiation causes:

Question # 8

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 9

Ultraviolet region lies in ______ series

Question # 10

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

Question # 11

The range of wavelengths of colurs in the visible colours is

Question # 12

Balmer series was identified in:

Question # 13

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

Question # 14

Coulomb multiplied by volt by volt gives the unit called:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
2 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
3 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
4 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
5 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
6 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
7 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
8 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
9 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
10 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only

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