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 spectrum emitted from hydrogen filled discharge tube is:

Question # 3

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 # 4

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

Question # 5

X-ray are also known as

Question # 6

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

Question # 7

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

Question # 8

Selenium is:

Question # 9

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

Question # 10

The photocopying process is called:

Question # 11

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

Question # 12

We can excite an atom by

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

The value of the metastable state for Neon is

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
2 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
3 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
4 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
5 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
6 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)
7 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
10 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series

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