Physics A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will Remain unaffected Increase Have its shape changed Decrease Remain unaffected Increase Have its shape changed Decrease ANSWER DOWNLOAD EXAMIANS APP
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 2R 3R/4 5R/4 R/2 2R 3R/4 5R/4 R/2 ANSWER DOWNLOAD EXAMIANS APP
Physics Electron microscope works on which of the following principles? Motion of charged particle in electromagnetic fields Wave Nature of electrons Optical interference Faraday's law of Electromagnetic induction Motion of charged particle in electromagnetic fields Wave Nature of electrons Optical interference Faraday's law of Electromagnetic induction ANSWER DOWNLOAD EXAMIANS APP
Physics The sensation of weightlessness in a spacecraft in an orbit is due to the Fact that spacecraft in the orbit has no energy Acceleration in the orbit which is equal to the acceleration due to gravity outside Absence of gravity outside Presence of gravity outside but not inside the spacecraft Fact that spacecraft in the orbit has no energy Acceleration in the orbit which is equal to the acceleration due to gravity outside Absence of gravity outside Presence of gravity outside but not inside the spacecraft ANSWER DOWNLOAD EXAMIANS APP
Physics Calculate the time period (in seconds) of a sound wave of wavelength 4m traveling with a speed of 500m/s 0.008 2000 1000 0.016 0.008 2000 1000 0.016 ANSWER DOWNLOAD EXAMIANS APP
Physics Stars in the sky appear to twinkle due to Multiple diminishing brightness A series of refractions A surface tension phenomenon A series of reflections Multiple diminishing brightness A series of refractions A surface tension phenomenon A series of reflections ANSWER DOWNLOAD EXAMIANS APP
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