Physics Lightning is produced when Clouds strike against impurities in air and the friction burns up these impurities Strong opposite charges in different clouds break down the resistance offered by the intervening air Water vapour produces electricity in the clouds Similar charges of electricity rush towards each other and then get repelled Clouds strike against impurities in air and the friction burns up these impurities Strong opposite charges in different clouds break down the resistance offered by the intervening air Water vapour produces electricity in the clouds Similar charges of electricity rush towards each other and then get repelled ANSWER DOWNLOAD EXAMIANS APP
Physics A periscope works on the principle of Diffraction Refraction Total internal reflection Reflection Diffraction Refraction Total internal reflection Reflection ANSWER DOWNLOAD EXAMIANS APP
Physics The sky appears blue because of Reflection on sea water Atmospheric water vapour Scattering of light Emision of blue wavelength by the sun Reflection on sea water Atmospheric water vapour Scattering of light Emision of blue wavelength by the sun ANSWER DOWNLOAD EXAMIANS APP
Physics Which colour has the highest energy? Blue Red Violet White Blue Red Violet White ANSWER DOWNLOAD EXAMIANS APP
Physics Where does hydroelectric energy come from? Solar Air All of these Water Solar Air All of these Water ANSWER DOWNLOAD EXAMIANS APP
Physics A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be < P P > P 2P < P P > P 2P ANSWER DOWNLOAD EXAMIANS APP
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