Physics Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly Prevent cold waves from the sky descending on earth Absorb heat from the atmosphere send it towards earth Produce heat and radiate it toward earth Reflect back the heat given by earth Prevent cold waves from the sky descending on earth Absorb heat from the atmosphere send it towards earth Produce heat and radiate it toward earth Reflect back the heat given by earth ANSWER DOWNLOAD EXAMIANS APP
Physics Which one of the following determines the sharpness of image in a camera ? The focal length of the lens Size of the camera The exposure time The aperture The focal length of the lens Size of the camera The exposure time The aperture ANSWER DOWNLOAD EXAMIANS APP
Physics The velocity of the sound is highest in Metal Water Vacuum Air Metal Water Vacuum Air ANSWER DOWNLOAD EXAMIANS APP
Physics When a bar magnet is cut into two equal halves, the pole strength of each piece – Becomes zero Remains the same Becomes double Becomes half Becomes zero Remains the same Becomes double Becomes half ANSWER DOWNLOAD EXAMIANS APP
Physics Magnetic keepers are pieces of Soft iron Cobalt Nickel Steel Soft iron Cobalt Nickel Steel ANSWER DOWNLOAD EXAMIANS APP
Physics Which metal is the best conductor of heat? Copper Silver All of these Gold Copper Silver All of these Gold ANSWER DOWNLOAD EXAMIANS APP
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