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

Coulomb multiplied by volt by volt gives the unit called:

Question # 2

The inkjet printer eject a thin stream of:

Question # 3

The spectrum emitted from hydrogen filled discharge tube is:

Question # 4

The photocopying process is called:

Question # 5

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 # 6

Tick the series which lies in the visible region:

Question # 7

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

Question # 8

Lyman series in the spectrum of hydrogen exists in the :

Question # 9

Selenium is:

Question # 10

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

Question # 11

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

Question # 12

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

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

CT scanning is the abbreviated name of

Question # 15

Braking radiation causes:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
2 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
3 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
4 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
5 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
6 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
7 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
8 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
9 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
10 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell

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