Physics Ball bearings are used in cycles, scooters etc to Increase the friction between the wheel and the axle None of these Reduce the friction between the wheel and the axle Reduce the friction between ground and the whee Increase the friction between the wheel and the axle None of these Reduce the friction between the wheel and the axle Reduce the friction between ground and the whee ANSWER DOWNLOAD EXAMIANS APP
Physics A white and smooth surface is Bad absorber and bad reflector of heat Good absorber and good reflector of heat Good absorber and bad reflector of heat Bad absorber and good reflector of heat Bad absorber and bad reflector of heat Good absorber and good reflector of heat Good absorber and bad reflector of heat Bad absorber and good reflector of heat ANSWER DOWNLOAD EXAMIANS APP
Physics The waveform of a certain signal can be studied by Sonometer Cathode ray oscilloscope Spectrometer P – n junction diode Sonometer Cathode ray oscilloscope Spectrometer P – n junction diode ANSWER DOWNLOAD EXAMIANS APP
Physics Eclipses occur due to which optical phenomena? Refraction Rectilinear propagation Reflection Diffraction Refraction Rectilinear propagation Reflection Diffraction ANSWER DOWNLOAD EXAMIANS APP
Physics Stars appear twinkling because of ......... of light. Absorption Scattering Reflection Emission Absorption Scattering Reflection Emission ANSWER DOWNLOAD EXAMIANS APP
Physics An egg sinks in soft water but floats in a concentrated solution of salt because Egg absorbs salt from the solution and expands Water has high surface tension Albumin dissolves in salt solution and egg becomes lighter The density of salt solution exceeds the density of eggs Egg absorbs salt from the solution and expands Water has high surface tension Albumin dissolves in salt solution and egg becomes lighter The density of salt solution exceeds the density of eggs ANSWER DOWNLOAD EXAMIANS APP
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