measurement and SI units - Category wise Question and Answer Practice Test with Solutions

Question : 21 [IAS Prelim]

A spherical body moves with a uniform angular velocity (w) around a circular path of radius r. Which one of the following statements is correct?

a) The body has a radial acceleration 2/5$ω^2$r directed away from the centre of the path

b) The body has no acceleration

c) The body has a radial acceleration $ω^2r$ directed toward centre of path

d) The body has an acceleration $ω^2$ tangential to its path

Question : 22 [IAS Prelim]

A parachutist jumps from a height of 5000 metre. The relationship between his falling speed, v and the distance fallen through d is best represented as :

a)

b)

c)

d)

Question : 23 [NDA]

Which one of the following pairs does not have the same dimension?

a) Focal length and height

b) Potential energy and kinetic energy

c) Density and specific gravity

d) Gravitational force and frictional force

Question : 24

In SI units the number of basic physical quantities are

a) 9

b) 3

c) 7

d) 21

Question : 25 [UP (Pre) 1998]

Megawatt is the measuring unit of power which is

a) Saved

b) Generated

c) Consumed

d) Lost in transmission