Physics After removing two electrons from helium atom it become? Gama particle Alpha particle X rays UV rays Gama particle Alpha particle X rays UV rays ANSWER DOWNLOAD EXAMIANS APP
Physics The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as Megasonics Audible sounds Infrasonics Ultrasonics Megasonics Audible sounds Infrasonics Ultrasonics ANSWER DOWNLOAD EXAMIANS APP
Physics Propagation of sound can be visualised as propagation of ________ variations in the medium Viscosity Porosity Elasticity Density Viscosity Porosity Elasticity Density ANSWER DOWNLOAD EXAMIANS APP
Physics Why does'nt the hydrogen atom emit X-rays? It has only one electron It is very small in size It is highly electropositive Its energy levels are very close to each other It has only one electron It is very small in size It is highly electropositive Its energy levels are very close to each other ANSWER DOWNLOAD EXAMIANS APP
Physics Why the needle of iron swims on water surface when it is kept gently ? Due to surface tension The density of needle is less than that of water Due to its shape It will remain under the water, when it will displace more water than its weight Due to surface tension The density of needle is less than that of water Due to its shape It will remain under the water, when it will displace more water than its weight ANSWER DOWNLOAD EXAMIANS APP
Physics An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct? Ve = Vp Cannot be determined Ve > Vp Ve < Vp Ve = Vp Cannot be determined Ve > Vp Ve < Vp ANSWER DOWNLOAD EXAMIANS APP
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