Electro magnetic waves-1 Electro magnetic waves-1 1 / 17 In an electro magnetic wave the disturbance is.. Electric field Magnetic field Both a, b None of these 2 / 17 Which of electro magnetic waves is used for purification of water Infrared rays Ultraviolet rays Radio waves All of above 3 / 17 X ray is capable of penetrating Bones Metallic body Humans flesh All of above 4 / 17 The ratio of amplitude of electric field and magnetic field is equal to 300000 m/hr 3×10^8 m/s 100 m/s None of these 5 / 17 The dimension of uo. £o is M^2LT^-1 M^0L^-2T^-2 M^0L^-2T^2 MLT^-2 6 / 17 The energy of an electro magnetic field is due to its Wavelength Frequency Electric magnetic field both None of these 7 / 17 The dimension of the ratio of electric field and magnetic field M^0L^0T ML^0T^ 0 M^0L^1T^-1 None of these 8 / 17 Which of the following is correct for velocity of electro magnetic wave B. E B/E E/B B+E 9 / 17 Which of the following is not electric magnetic wave Light waves X ray Sound waves Infrared waves 10 / 17 Nature of electro magnetic waves is Longitudinal Transverse Both Curved 11 / 17 Which of the following is correct for speed of electro magnetic waves in vacuum C= uo. £o C={uo.£o}^1/2 C=uo/£o C= (uo. £o) ^-1/2 C= £o/uo 12 / 17 The phase difference between electric waves and magnetic wave in electro magnetic waves is 2π Π/4 Π/2 Zero 13 / 17 Which of the following having highest penetration power Alpha rays Bita rays Gamma rays Cathode rays 14 / 17 Which of the electro magnetic radiation having minimum wave length Ultraviolet X ray Micro waves Y rays 15 / 17 X rays are the waves Electron Moving proton Moving negative charge Electro magnetic waves 16 / 17 The value of (uo. £o) ^-1/2 3×10^8 km/s 3×10^10 cm/s 3×10^9m/s None of these 17 / 17 The energy density of magnetic field vector B is B/2u B^2/u B^2/2u B^2/3u Your score isThe average score is 0% 0% Restart quiz
