Physics A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat? Conduction and radiation only Conduction, convection and radiation Convection and radiation only Conduction and convection only Conduction and radiation only Conduction, convection and radiation Convection and radiation only Conduction and convection only ANSWER DOWNLOAD EXAMIANS APP
Physics A copper disc has a hole. If the disc is heated, the size of the hole Decreases First increases and than decreases Increases No change Decreases First increases and than decreases Increases No change ANSWER DOWNLOAD EXAMIANS APP
Physics A television channel is characterised by Physical dimension of television screen Velocity of transmitted signal Frequency of transmitted signal Size of picture tube Physical dimension of television screen Velocity of transmitted signal Frequency of transmitted signal Size of picture tube ANSWER DOWNLOAD EXAMIANS APP
Physics A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments Depends on the total mass of all the fragments Is zero Depends on the speeds of various fragments Is infinity Depends on the total mass of all the fragments Is zero Depends on the speeds of various fragments Is infinity ANSWER DOWNLOAD EXAMIANS APP
Physics What is the gravity of moon as compared to the Earth 1/5 th of Earth 1/4 th of Earth 1/8 th of Earth 1/6 th of Earth 1/5 th of Earth 1/4 th of Earth 1/8 th of Earth 1/6 th of Earth ANSWER DOWNLOAD EXAMIANS APP
Physics The blue colour of water in the sea is due to Reflection of blue light by impurities in sea water Absorption of other colours except blue by water molecules Scattering of blue light by water molecules Reflection of blue sky by sea water Reflection of blue light by impurities in sea water Absorption of other colours except blue by water molecules Scattering of blue light by water molecules Reflection of blue sky by sea water ANSWER DOWNLOAD EXAMIANS APP
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