Physics After long periods of use, a grey spot develops on the inside of a bulb. This is because The tungsten filament evaporates and collects there Glass undergoes a change due to the heat The heat of the bulb scorches the glass at the top Dust inside the bulb condenses on the top The tungsten filament evaporates and collects there Glass undergoes a change due to the heat The heat of the bulb scorches the glass at the top Dust inside the bulb condenses on the top ANSWER DOWNLOAD EXAMIANS APP
Physics The blue colour of sky is due to Scattering of longer wavelengths of sunlight in the atmosphere Refraction of sunlight Scattering of shorter wavelengths of sunlight in the atmosphere Reflection of sunlight Scattering of longer wavelengths of sunlight in the atmosphere Refraction of sunlight Scattering of shorter wavelengths of sunlight in the atmosphere Reflection of sunlight ANSWER DOWNLOAD EXAMIANS APP
Physics In mirrors the back surface is coated with a thin layer of : Silver nitrate Silver Red oxide Mercury Silver nitrate Silver Red oxide Mercury ANSWER DOWNLOAD EXAMIANS APP
Physics Electric power is measured in units of Watt Ampere Volt Joule Watt Ampere Volt Joule ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following is not true about X-rays? Can be reflected or refracted Travel with the speed of light Can affect photographic plates Have low penetrating power Can be reflected or refracted Travel with the speed of light Can affect photographic plates Have low penetrating power ANSWER DOWNLOAD EXAMIANS APP
Physics Why the needle of iron swims on water surface when it is kept gently ? It will remain under the water, when it will displace more water than its weight The density of needle is less than that of water Due to its shape Due to surface tension It will remain under the water, when it will displace more water than its weight The density of needle is less than that of water Due to its shape Due to surface tension ANSWER DOWNLOAD EXAMIANS APP
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