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Science QA Physics

153.Who discovered electron
Ruther ford
Goldstein
Einstein
J.J.Thomson
154.The centripetal force of electron around the nucleus is provided by
Magnetic force
Nuclear force
Electrostatic force of attraction
Gravitational force
155.Radio activity is discovered by
Roentgen
Mary Curie
Henry bequrrel
Joliot Curie
156.Unit of Radioactivity
becqurrel
curie
disintegration/second
all the above
157.Principle of atom bomb
nuclear fission
nuclear fusion
thermo nuclear reaction
none
158.Energy released per nuclear fission
200 eV
26.7 MeV
200 MeV
26.7 eV
159.Rain drop is spherical due to
Buyont force
Surface tension
Upthrust force
Viscous force
160.when temperature decreases,surface tension is
zero
not changed
increases
decreases
161.Instrument measuring atmospheric pressure
Barometer
Calori meter
Mano meter
Rain gauge
162.1The pressure of fluids depends on
Volume
Temperature
Density
Nature of substance
163.Absolute zero is
273oC
-273oC
0oC
100oC
164.When a substance is heated its kinetic energy is
zero
not changed
increases
decreases
165.Boiling point of water in kelvin scale
100K
273K
373K
473K
166.Transmission of heat in vaccum
Convection
conduction
radiation
none
167.Telescope is invented by
Newton
Galelio
Franklin
Edison
168.When a light travel from rarer to denser medium it deflected
away from normal
Towards normal
not deflected
All
169.Identify the principle of endoscope
Reflection
Refraction
Total internal reflection
dispersion
170.What is the unit of power of lens
Candela
Watt
Dioptre
Decible
171.sound is measured in
Candela
Decible
Ampere
Mole
172.Intensity of sound depends on
Amplitude
Wavelength
Frequency
Time period
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