Physics Sound becomes hazardous noise pollution at decibels? Above 50 db Above 120 db Above 30 db Above 80 db Above 50 db Above 120 db Above 30 db Above 80 db ANSWER DOWNLOAD EXAMIANS APP
Physics To resolve an object in an electron microscope, The wavelength of the electrons must be greater than the diameter of the object. The wavelength of the electrons must be close to the diameter of the object None of these Both A & B The wavelength of the electrons must be greater than the diameter of the object. The wavelength of the electrons must be close to the diameter of the object None of these Both A & B ANSWER DOWNLOAD EXAMIANS APP
Physics Superconductors are those elements Whose conductivity is intermediate between metals and insulators Which conduct electricity only at super-high temperatures Which turn into insulators at very low temperatures Whose resistance falls almost to zero at very low temperatures Whose conductivity is intermediate between metals and insulators Which conduct electricity only at super-high temperatures Which turn into insulators at very low temperatures Whose resistance falls almost to zero at very low temperatures ANSWER DOWNLOAD EXAMIANS APP
Physics Electromagnetic waves are transverse in nature is evident by Reflection Polarisation Interference Diffraction Reflection Polarisation Interference Diffraction ANSWER DOWNLOAD EXAMIANS APP
Physics When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is The blue ray The green ray The violet ray The red ray The blue ray The green ray The violet ray The red ray ANSWER DOWNLOAD EXAMIANS APP
Physics What apparatus is used to locate a submerged object? Sonar Pulsar Radar Quasar Sonar Pulsar Radar Quasar ANSWER DOWNLOAD EXAMIANS APP
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