Physics

    Physics
    Of the following properties of a wave, the one that is independent of the other is its
    The amplitude (A) is independent of other means it is not related to the other quantities.
    Author: rikazzz Comment
    Physics
    What is the SI unit of electric current?
    SI unit of electric current is Ampere.
    Author: rikazzz Comment
    Everyday Science
    A light ray will retrace its path after reflection for a spherical mirror when it passes through
    If a ray is incident normally on a point on the spherical reflecting surface, the angle of incidence, i=0. So, the angle of refraction, r=0. Therefore, the ray retraces its own path after reflection. And such a ray travels through the centre of curvature of the mirror.
    Author: rikazzz Comment
    Everyday Science
    The electrical instrument rheostat is used to control electric current by varying the:
    Author: rikazzz Comment
    Physics
    Light travels fastest in
    Light travels fastest in air.
    Author: rikazzz Comment
    Physics
    A device which is used to limit the current in an electrical circuit is called a
    A fuse places a limit on the amount of current that can be drawn by an electric circuit by opening (blowing or melting) when the current exceeds a preset limit. This protects the circuit and the surroundings from fire or damage in the case of an overload or short circuit.
    Author: rikazzz Comment
    Physics
    Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
    When length of capillary tube is insufficient then we would observe no rise on level of water because their will be no air pressure created enough to rise the water level.
    Author: rikazzz Comment
    Physics
    The frequency used in TV and radar system lies in
    The frequency used in TV and radar system lies in UHF.
    Author: rikazzz Comment
    Physics
    Through which light cannot pass?
    Light cannot pass through book.
    Author: rikazzz Comment
    Physics
    Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly
    It is because the night side of Earth will radiate infra-red radiation (heat) back into space. When there is cloud cover, the clouds act like a blanket and trap the heat close to the ground just like a blanket traps heat close to our body.
    Author: rikazzz Comment