ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

00:00
Question # 1

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

Question # 2

Lyman series in the spectrum of hydrogen exists in the :

Question # 3

The shell closer to the nucleus is called:

Question # 4

Gaussian surface is always:

Question # 5

The electric field lines start from:

Question # 6

CT scanning is the abbreviated name of

Question # 7

The first shell near the neucles is

Question # 8

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 # 9

X-ray are also known as

Question # 10

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

Question # 11

The value of the metastable state for Neon is

Question # 12

Coulomb multiplied by volt by volt gives the unit called:

Question # 13

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 # 14

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

Question # 15

The He-Ne laser discharge tube is filled with:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
2 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
3 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
4 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
5 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
6 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
7 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
8 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
9 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
10 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)

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