Physics Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes 5R/4 R/2 3R/4 2R 5R/4 R/2 3R/4 2R ANSWER DOWNLOAD EXAMIANS APP
Physics A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is Of higher pitch when train departs The same in both cases in all respects Of higher intensity when train arrives Of higher pitch when train arrives Of higher pitch when train departs The same in both cases in all respects Of higher intensity when train arrives Of higher pitch when train arrives ANSWER DOWNLOAD EXAMIANS APP
Physics Heat energy is transferred by conduction whenever molecules Collide each other All of these Particles replaces there places Means of photons Collide each other All of these Particles replaces there places Means of photons ANSWER DOWNLOAD EXAMIANS APP
Physics The unit of noise pollution (level) is : None of these Ppm Decimal Decibel None of these Ppm Decimal Decibel ANSWER DOWNLOAD EXAMIANS APP
Physics Optical fiber works on the principle of Total internal reflection Scattering Refraction Interference Total internal reflection Scattering Refraction Interference 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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