Physics General Studies Questions for ssc upsc competitive examspage 15

211 .If the earth were to spin faster, acceleration due to gravity at the poles:

A. increases

B. decreases

C. remains the same

D. None of these

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212 .The process of combining strings is known as

A. compiling

B. Combining

C. Attaching

D. Concatenation

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213 .When a charged particle entres a uniform magnetic field its kinetic energy

A. Remains constant

B. increased

C. Decreases

D. becomes

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214 .For an astronaut in a space ship, the sky appears

A. black

B. white

C. green

D. blue

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215 .Earth Summit was held in -

A. Chicago

B. Adilaide

C. Rio de Jenerio

D. London

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216 .Light year is a measurement of-

A. Speed of aeroplanes

B. speed of rockets

C. Stellar distance

D. Speed of light

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217 .How does time period (T) of aseconds pendulum very with length (l) ?

D. T does not depend on l

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218 .An instrument used to measure humidity is

A. anemometer

B. hygrometer

C. thermomenter

D. pyrheliometer

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219 .Why is sound heard with more intensity through CO2 than through the air?

A. density of CO2 is more than that of air

B. density of CO2 is less than that of air

C. air is a bad conductor of heat

D. CO2 is a compound, but air is a mixture of gases.

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220 .This strain of rice was one of the first High Yielding Varieties of seeds developed in the world. Name it

A. IR-8

B. IS- 7

C. RS â€“ 8

D. RV â€“ 9

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221 .Ice is packed in saw dust because

A. sa dust does not stikc to the ice

B. saw dust will not get melted easily

C. saw dust is poor conductor of heat

D. saw dust is a good conductor of heat

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222 .In which of the following sequences are the electromagnetic radiations in decreasing order of wave lengths

A. infrared, radio, X â€“rays, visible

B. radio, infrared, visible, X â€“ rays

C. radio, visible, infrared, X â€“ rays

D. X â€“ rays, visible, infrared, radio

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223 .What is the principle by which a cooling system (Radiator) in a motor car works?

A. Conduction only

B. Convection

C. Radiation only

D. Both conduction and radiation

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224 .Which of the following is not the cause of low conductivity of electrolyte

A. Low drift velocity of ions

B. High resistance offered by the solution of the motion of ions

C. Low number of density of charge carriers

D. Ionization of salt

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225 .If the pressure in closed vessel is reduced by drawing out some gas, the mean free path of the gas molecules will

A. increase

B. increase or decrease depending on the nature of

C. remain unchanged

D. decrease

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