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

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Question # 1

The shell closer to the nucleus is called:

Question # 2

The photocopying process is called:

Question # 3

Photons must have energy equal to

Question # 4

Lyman series in the spectrum of hydrogen exists in the :

Question # 5

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

Question # 6

The first shell near the neucles is

Question # 7

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

Question # 8

The electric field lines start from:

Question # 9

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

Question # 10

Balmer series was identified in:

Question # 11

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

Question # 12

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 # 13

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

Question # 14

A metastable stae:

Question # 15

If the distance between two charges is doubled,the force between them will become:

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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 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
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
3 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
4 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
5 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
6 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
7 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
8 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
9 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
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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