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

00:00
Question # 1

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

Question # 2

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

Question # 3

We can excite an atom by

Question # 4

The photocopying process is called:

Question # 5

Laser is a beam of:

Question # 6

The inkjet printer eject a thin stream of:

Question # 7

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 # 8

Braking radiation causes:

Question # 9

Photons must have energy equal to

Question # 10

The shell closer to the nucleus is called:

Question # 11

The lasing or active medium in He-Ne laser discharge tube is:

Question # 12

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

Question # 13

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

Question # 14

Tick the series which lies in the visible region:

Question # 15

A metastable stae:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
2 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
3 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
4 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
5 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
6 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
7 An compared to solid matter, a crack or an air bubble allows:
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
8 The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
9 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
10 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

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