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

Tick the series which lies in the visible region:

Question # 2

The value of the metastable state for Neon is

Question # 3

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

Question # 4

Laser is a beam of:

Question # 5

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

Question # 6

Coulomb multiplied by volt by volt gives the unit called:

Question # 7

The range of wavelengths of colurs in the visible colours is

Question # 8

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

Question # 9

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

Question # 10

CT scanning is the abbreviated name of

Question # 11

The first shell near the neucles is

Question # 12

The inkjet printer eject a thin stream of:

Question # 13

Static electricity is produced by the transfer of:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
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 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)
4 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
5 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
6 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
7 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
10 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

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