Physics In a refrigerator what produces the cooling ? The sudden expansion of a compressed gas None of these The ice which deposits on the freezer The evaporation of a volatile liquid The sudden expansion of a compressed gas None of these The ice which deposits on the freezer The evaporation of a volatile liquid ANSWER DOWNLOAD EXAMIANS APP
Physics Sound travels with a different speed in media. In what order does the velocity of sound increase in these media? Iron, air and water Iron, water and air Air, water and iron Water, iron and air Iron, air and water Iron, water and air Air, water and iron Water, iron and air ANSWER DOWNLOAD EXAMIANS APP
Physics When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to : Refraction Forced vibrations Damped vibrations Reflection Refraction Forced vibrations Damped vibrations Reflection ANSWER DOWNLOAD EXAMIANS APP
Physics The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as Infrasonics Megasonics Ultrasonics Audible sounds Infrasonics Megasonics Ultrasonics Audible sounds ANSWER DOWNLOAD EXAMIANS APP
Physics The method of magnetisation is: Passing alternating current through it Heating a magnet Hammering a magnet Passing direct current through it Passing alternating current through it Heating a magnet Hammering a magnet Passing direct current through it ANSWER DOWNLOAD EXAMIANS APP
Physics Steam at 100°C causes more severe burns than water at 100°C because Steam has latent heat of vaporisation Water has latent heat of fusion Steam has no specific heat capacity Water has no specific heat capacity Steam has latent heat of vaporisation Water has latent heat of fusion Steam has no specific heat capacity Water has no specific heat capacity ANSWER DOWNLOAD EXAMIANS APP
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