Related Questions

240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
Who discovered radioactivity?
A Max Planck
B James Clerk Maxwell
C Henri Becquerel
D Heinrich Hertz
Radioactivity of an isotope is expressed in
A Barns
B MeV
C Curie
D Ergs
Radioactivity is a phenomenon of the spontaneous emission of
A protons (alpha particles)
B electrons (beta particles)
C gamma rays (short wave electromagnetic waves)
D All of the above
The unit of radioactivity is
A Electron volt
B Electron ampere
C Curie
D MV
The phenomenon of radioactivity was discovered by
A Madam Curie
B Bacquerrel
C Roentgen
D J.J. Thomson
Unit of radioactivity is
A barn
B fermi
C angstrom
D Curie
Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?
A Absolute instruments
B Indicating instruments
C Recording instruments
D Integrating instruments
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
India's latitudinal and longitudinal extent measured in degrees are almost the same, but its north-south extent measured in km is greater than its east-west extent. This is due to the fact that
A Longitudes are not parallel lines
B The distance between latitudes remains the same but the distance between longitudes is greatest at the Equator and nil at the poles where all longitudes join
C All longitudes with their opposites form great circles
D The earth is not a perfect sphere

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