GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 055

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 055

541). Penetrating power is greater in the case of
A). alpha - ray
B). ß - ray
C). Gamma - ray
D). X-ray

Answer: Gamma - ray


   
542). Consider the following statements :
Radioactive substances emit I. α-rays II. β-rays III. X-rays IV. γ-rays of the statements :
A). I and II are correct
B). I, II and III are correct
C). I, II and IV are correct
D). All are correct

Answer: I, II and IV are correct


   
543). X-rays cannot penetrate through
A). wood
B). aluminium
C). lead
D). iron

Answer: lead


   
544). Who discovered that the earth moves round the sun ?
A). Newton
B). Galileo
C). Aristotle
D). Copernicus

Answer: Copernicus


   
545). Planet nearest to the sun is
A). pluto
B). mercury
C). Venus
D). Uranus

Answer: mercury



546). A raw egg and a boiled egg of the same appearance, same size and same mass can be distinguished, without breaking, by using
A). inertia of motion
B). inertia of rest
C). conservation of linear momentum
D). conservation of angular momentum

Answer: inertia of motion


   
547). Nib of a pen is split keeping in view the phenomenon of
A). osmosis
B). diffusion
C). capillarity
D). cohesion

Answer: capillarity

   
548). Speeds of bodies exceeding the speed of sound are called
A). supersonic
B). ultrasonic
C). infrasonic
D). superfast

Answer: supersonic


   
549). Refractive index is highest for
A). glass
B). water
C). rock-salt
D). diamond

Answer: diamond


   
550). The splitting of a beam of white light into its different colours is known as
A). refraction
B). reflection
C). dispersion
D). none of these

Answer: dispersion