Question # 1

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

Choose an answer

Double

Half

One third

One fourth

The He-Ne laser discharge tube is filled with:

Choose an answer

85% He

15% He

50% He

60% He

85% Ne

CT scanning is the abbreviated name of

Choose an answer

Computed Technology

Computed Technique

Computed Technology

Computerized Technique

Ultraviolet region lies in ______ series

Choose an answer

Layman

Balmer

P fund

B racket

The holes created in the L and M shells are occupied by transitions of:

Choose an answer

Electrons from lower states

Electrons from higher state

Positrons from higher states

Electrons from K shell

Both (A) and (B)

Laser is a beam of:

Choose an answer

Visible light

Infra red light

Ultra violet light

Violet light only

yellow light only

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

Choose an answer

VIBGYOR

ROYBGIV

ROYBIGV

BIGROYV

None of these

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

Choose an answer

Less than atmospheric pressure

Much less than atmospheric pressure

Greater than atmospheric pressure

Much greater than atmospheric pressure

Both C and D

Lyman series in the spectrum of hydrogen exists in the :

Choose an answer

Infra-red region

Visible region

Ultraviolet region

Both(A) and (B)

None of these

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

Choose an answer

Ultra red region

Visible region

Ultraviolet region

Any of these

None of these

Balmer series was identified in:

Choose an answer

1685

1785

1885

1985

1585

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

Choose an answer

Bohr

Rydberg

Planck

Rutherford

Coulomb

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

Choose an answer

Bohr

Rydberg

Planck

Rutherford

Coulomb

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

Choose an answer

Lyman series

Balmer series

Paschen series

Brackett series

Pfund series

Static electricity is produced by the transfer of:

Choose an answer

Electrons

Protons

One fluid

Two fluid

None of these

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 20 Atomic Spectra Physics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer