GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 067

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 067

661). When two resistors, each of value 10 ohms, are connected in parallel, what is the effective value of the combination?
A). 4 ohms
B). 5 ohms
C). 6 ohms
D). 7 ohms

Answer: 5 ohms


   
662). In optices, the relation between u,v and f is
A). 1/f=1/u+1/v
B). 1/u=1/f,1/v
C). 1/f=1/u 1/v
D). 1/v=1/f+1/u

Answer: 1/f=1/u+1/v



   
663). The half life period of C^14 is 5600 years. What is the time required for C^14 to become 1/4th of its initial size?
A). 4000 years
B). 5600 years
C). 11,200 years
D). 13,000 years

Answer: 11,200 years


   
664). Light year is the unit of
A). distance
B). time
C). weight
D). intensity of light

Answer: distance


   
665). If an object weighs 60 kgm wt on earth, its weight on the surface of the moon Will be
A). 360 kgm - wt
B). 0 kgm - wt
C). 10kgm - wt
D). 6kgm - wt

Answer: 10kgm - wt



666). A small drop of mercury is spherical due to
A). viscosity
B). surface tension
C). gravity
D). elasticity

Answer: surface tension


   
667). The unit of power of a lens is
A). decibal
B). pascal
C). dioptre
D). stoke

Answer: dioptre


   
668). The smallest planet in the solar system is
A). mars
B). mercury
C). earth
D). Pluto

Answer: Pluto


   
669). The time taken by light to travel from the sun to the earth is
A). 15 min
B). 8.33 min
C). 4.66 min
D). 1.5 min

Answer: 8.33 min


   
670). A convex lens forms an image of a distant object on a screen. If the upper half of the lens is blocked by a piece of paper
A). the lower half of the image will be cut off
B). the upper half of the image will be cut off
C). the image will be full, but its intensity will be reduced
D). nothing will happen to the image

Answer: the lower half of the image will be cut off