Physics Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly 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 Prevent cold waves from the sky descending on earth Absorb heat from the atmosphere send it towards earth ANSWER DOWNLOAD EXAMIANS APP
Physics A transformer Is used to decrease or increase AC voltage Converts AC voltage to D.C. voltage Converts electrical energy into mechanical energy Converts DC to AC Is used to decrease or increase AC voltage Converts AC voltage to D.C. voltage Converts electrical energy into mechanical energy Converts DC to AC ANSWER DOWNLOAD EXAMIANS APP
Physics Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation? Diffraction Polarization Interference Scattering Diffraction Polarization Interference Scattering ANSWER DOWNLOAD EXAMIANS APP
Physics If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is 12 cm 6 cm 24 cm 1 cm 12 cm 6 cm 24 cm 1 cm ANSWER DOWNLOAD EXAMIANS APP
Physics Refractive Index of glass with respect to water is 43864 44052 43924 44082 43864 44052 43924 44082 ANSWER DOWNLOAD EXAMIANS APP
Physics In the remote control of television, electromagnetic waves used are Microwave Ultraviolet Infrared Radiowave Microwave Ultraviolet Infrared Radiowave ANSWER DOWNLOAD EXAMIANS APP
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