Physics Copper wires are generally used for electrical power transmission instead of iron wire because : Copper is a better conductor of electricity than iron Copper is lighter than iron Copper is cheaper than iron Copper can take higher power than iron Copper is a better conductor of electricity than iron Copper is lighter than iron Copper is cheaper than iron Copper can take higher power than iron ANSWER DOWNLOAD EXAMIANS APP
Physics Rain drops fall from great height. Which among the following statements is true regarding it? Their velocity increases and they fall with different velocity on the earth They fall with same ultimate velocity They fall with that ultimate velocity, which are different for different droplets Their velocity increases and they fall with same velocity on the earth Their velocity increases and they fall with different velocity on the earth They fall with same ultimate velocity They fall with that ultimate velocity, which are different for different droplets Their velocity increases and they fall with same velocity on the earth ANSWER DOWNLOAD EXAMIANS APP
Physics If a copper wire is increased to double its length, its resistance will become Half Double One–fourth Four times Half Double One–fourth Four times ANSWER DOWNLOAD EXAMIANS APP
Physics Supercooling is cooling of liquid ________ At melting point Above melting point Below melting point Below freezing point At melting point Above melting point Below melting point Below freezing point ANSWER DOWNLOAD EXAMIANS APP
Physics A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ? Remain constant Will increase first and then dcrease Increase Dacrease Remain constant Will increase first and then dcrease Increase Dacrease ANSWER DOWNLOAD EXAMIANS APP
Physics In a Laser (say neon laser) all the atoms emit the light waves of All of these Same frequency Same phase Same amplitude All of these Same frequency Same phase Same amplitude ANSWER DOWNLOAD EXAMIANS APP
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