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

Question # 2

Balmer series was identified in:

Question # 3

The results of spectra obtained by Blamer were expressed in 1896 by

Question # 4

The spectrum emitted from hydrogen filled discharge tube is:

Question # 5

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 # 6

Braking radiation causes:

Question # 7

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

Question # 8

We can excite an atom by

Question # 9

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

Question # 10

The value of the metastable state for Neon is

Question # 11

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

Question # 12

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

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

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

Question # 15

CT scanning is the abbreviated name of

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
2 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
3 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
4 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
5 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
6 The holes created in the L and M shells are occupied by transitions of:
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
7 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
8 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
9 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
10 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography

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