Toggle navigation
Terms & Conditions
Contact
Home
GK
Computer
TRB
TNPSC
Aptitude
English
Reasoning
Technical
Bank Exams
SSC
Engineering
Puzzles
Interview
GD Topics
Blogs
Online Test
Free tnpsc model questions Online Test - MeritNotes
Home
Online Exam
No. of Questions :10
Remaining Time :
1. The charge of helium atom is equal to
(a)
twice the charge of an electron
(b)
charge of positron
(c)
charge of electron
(d)
charge of proton
2. When cathode rays pass through the gas, they
(a)
neutralise the gas
(b)
condense the gas
(c)
compress the gas
(d)
ionise the gas
3. A secondary photon is _____ with the stimulating photon.
(a)
sometimes out of phase
(b)
sometimes in phase
(c)
always in phase
(d)
always out of phase
4. Electrons revolving in stationary orbits
(a)
sometimes radiate energy
(b)
radiates very less energy
(c)
radiates enormous amount of energy
(d)
does not radiate energy
5. A photon produced by stimulated emission is called _____ photon.
(a)
primary
(b)
secondary or stimulated
(c)
stimulated
(d)
secondary
6. Who suggested that an atom is a sphere of positive charge and electrons are embedded in it?
(a)
J.J. Thomson
(b)
Rutherford
(c)
Dalton
(d)
Prout
7. Optical pumping is used to produce
(a)
Normal population
(b)
UV-radiation
(c)
IR radiation
(d)
Population inversion
8. According to Rutherford's atom model, atoms should emit
(a)
continuous spectrum
(b)
line spectrum
(c)
band spectrum
(d)
all the above
9. Wavelength of X-rays depends upon
(a)
kinetic energy of the electrons producing them
(b)
the number of electrons striking the target
(c)
thickness of the target material
(d)
the target material used
10. According to electromagnetic theory, an accelerated electric charges radiates energy in the form of
(a)
electromagnetic waves
(b)
sound waves
(c)
nuclear energy
(d)
atomic energy
