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

Gaussian surface is always:

Question # 2

The shell closer to the nucleus is called:

Question # 3

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Question # 4

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

Question # 5

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

Question # 6

Balmer series was identified in:

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

The first shell near the neucles is

Question # 9

Coulomb multiplied by volt by volt gives the unit called:

Question # 10

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

Question # 11

The value of the metastable state for Neon is

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The process of formation of spectrum is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
2 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
3 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
4 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
5 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
6 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
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 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 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
10 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

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