Physics General Studies Questions for ssc upsc competitive examspage 7

91 .X- rays are â€¦â€¦â€¦. waves.

A. Longitudinal

B. Transverse

C. Electromagnetic

D. Elastic

View Answer

Discuss in Forum

92 .The velocity of sound in moist is more than in dry air because the moist air has

A. more density than dry has

B. less density than dry air

C. more pressure than dry air

D. less pressure than dry air

View Answer

Discuss in Forum

93 .The method of age determination called 'radioactive uranium dating' cannot be used to determine the age of

A. rocks

B. fossils and plant bodies

C. the earth

D. minerals on earth

View Answer

Discuss in Forum

94 .Which of the following is a primary consumer?

A. Cow

B. Dog

C. Hawk

D. Bear

View Answer

Discuss in Forum

95 .SI unit of luninious intensity is:

A. lumen

B. lux

C. candela

D. watt

View Answer

Discuss in Forum

96 .Which one among the following rroups is the most abundant in terms of number os species identified?

A. Fundgi

B. Green plants

C. Bacteria

D. Insects

View Answer

Discuss in Forum

97 .Sound waves are similar to the waves

A. of laswer light passing through air

B. generated in a stretched wire by hitting or plucking the wire

C. generated in a pipe filled with air by moving the piston attached to the pipe up and down

D. generated by the mobile phone towers

View Answer

Discuss in Forum

98 .The image of our face in a plane mirror

A. real

B. magnified

C. diminished

D. none of these

View Answer

Discuss in Forum

99 .Which one of the following phenomena is used in optical fibres?

A. Scattering

B. successive reflections

C. Refraction

D. total internal reflection

View Answer

Discuss in Forum

100 .The shape of a rain drop is spherical due to-

A. Viscosity

B. Surface tension

C. Elasticity

D. Gravitation

View Answer

Discuss in Forum

101 .The value of g on the Earth's surface changes due to

A. Both rotation and shape of the Earth

B. Rotation orf the Earth only

C. Shape of Earth only

D. None of the above

View Answer

Discuss in Forum

102 .The Doppler's effect is applicable for

A. light wave

B. sound wave

C. space wave

D. both ( a ) and ( b )

View Answer

Discuss in Forum

103 .Sound moves with higher velocity if

A. pressure of the medium is decreased

B. temperature of the medium inincreased

C. humidity of the medium

D. both ( b ) and ( c )

View Answer

Discuss in Forum

104 .Î³- ray consists of:

A. Meson particles

B. Neutrino particles

C. Higg's boson

D. Electromagnetic waves

View Answer

Discuss in Forum

105 .A reversible and an irreversible engine are working between the same limits of temperature. The efficiency of

A. the reversible engine is greater that the irreversible engine

B. each engine is 100%

C. the two engine are equal

D. the irreversible engine is greater than the reversible engine

View Answer

Discuss in Forum

« Previous 1 2 5 678 9 16 17 Next »