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Free gk questions Online Test - MeritNotes
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No. of Questions :10
Remaining Time :
1. The principle used in Atom bomb is
(a)
nuclear interaction
(b)
nuclear fusion
(c)
nuclear fission
(d)
none of the above
2. The decrease in cosmic ray intensity at the earth’s equator is explained to be due to
(a)
production of secondary cosmic rays
(b)
high temperature at the equator
(c)
earth’s gravitational field
(d)
earth’s magnetic field
3. X-rays could not be diffracted by ordinary grating on account of their
(a)
high velocity
(b)
high frequency
(c)
short wavelength
(d)
high penetrating power
4. Particles like mesons were discovered from
(a)
elementary particles
(b)
gamma rays
(c)
cosmic ray showers
(d)
cosmic rays
5. Mass defect is equal to
(a)
Assumed nuclear mass ÷ Real mass
(b)
Assumed nuclear mass × Real mass
(c)
Assumed nuclear mass + Real mass
(d)
Assumed nuclear mass - Real mass
6. Who discovered Neutron?
(a)
Chadwick
(b)
Rutherford and Soddy
(c)
Irene Curie and F.Joliot
(d)
Bothe and Becker
7. The part of the mass spectrometer which allows the iron beam of a particular velocity to pass through another slit is
(a)
collimator
(b)
magnetic field
(c)
velocity selector
(d)
narrow slits
8. Who named the ionising radiations from outer cosmos as cosmic rays?
(a)
Irene Curie
(b)
Millikan
(c)
Sommerfeld
(d)
Neil Bohr
9. Thermal neutrons have energy of about
(a)
25 eV
(b)
2.5 eV
(c)
0.25 eV
(d)
0.025 eV
10. In fast breeder reactors, the fuel pellets are packed in special tubes made up of
(a)
tungsten
(b)
rubidium
(c)
stainless steel
(d)
aluminium
