GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 114

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 114

1131). For a normal person, the least distance at which the objects are seen clearly is

A). 0.025 m

B). 0.05 m

C). 0.25 m

D). 0.5 m

Answer: 0.25 m

   

1132). The radiations used to purify water by killing bacteria are

A). radio waves

B). electric waves

C). infrared rays

D). ultraviolet waves

Answer: ultraviolet waves

   

1133). A TV camera

A). Converts light impulses into sound

B). Converts light impulses into electrical impulses

C). Converts electrical impulses into light impulses

D). Converts electrical impulses into sound

Answer: Converts electrical impulses into light impulses

   

1134). Unit of work done is

A). metre

B). joule

C). watt

D). second

Answer: joule

   

1135). Which ray has the shortest wavelength?

A). Gamma rays

B). X- rays

C). alpha - rays

D). ß - rays

Answer: Gamma rays

1136). The best conductor of heat among liquids is

A). water

B). mercury

C). ether

D). alcohol

Answer: mercury

   

1137). The emission of electrons from a metal by heating the metal to a higher temperature is called

A). thermoelectric effect

B). photoelectric effect

C). thermionic effect

D). joule effect

Answer: thermoelectric effect

   

1138). Atomic number of an atom is

A). the number of electrons present in its nucleus

B). the number of neutrons present in its nucleus

C). the number of protons present in its nucleus

D). the number of neutrons and protons present in its nucleus

Answer: the number of protons present in its nucleus

   

1139). X-rays

A). do not affect photographic plates

B). are not deflected by electric fields

C). do not lonise the gas through which they pass

D). cannot pass through glasses

Answer: are not deflected by electric fields

   

1140). Nanosecond means

A). one-billionth of a second

B). one-millionth of a second

C). one second

D). none of these

Answer: one-billionth of a second