Electro magnetic wave -2 Electro magnetic wave -2 1 / 18 The electric field and magnetic field is related with speed of light C is B= C.E C= B.E E=B.C None of these 2 / 18 The nature of electro magnetic waves is Longitudinal Transverse Both None of these 3 / 18 The main effect of infrared waves is Sensation of vision Thermal effect Photo electric effect None of these 4 / 18 The unit of B/E in electro magnetic waves is m. s s/m m/s m/s^2 5 / 18 The energy density of electric field is £o.E^2 1/2.£o.E^2 2€o.E^2 1/4 £o.E^2 6 / 18 Clouds reflect from.. Microwave Radio wave Infrared rays Ultraviolet rays 7 / 18 Which of the following has minimum wavelength X rays Radio wave Y ray Tv wave 8 / 18 Which of the following are used to make labs free from bacteria U. V rays X ray Gamma rays Infrared rays 9 / 18 The direction of propagation of electro magnetic waves is Parallel to electric field Parallel to magnetic field Parellel to BxE Parallel to ExB 10 / 18 The equation for electro magnetic waves is E= Eo( sin wt-kx) and B= Bo. Sin (wt-kx) then Eo. w= Bo. K Eo. Bo= ek Eo. K=Bo.w None of these 11 / 18 Electro magnetic waves can be Light X ray Infrared All 12 / 18 Speed of electro magnetic waves is uo. £o 1/uo.£o 1/(uo.£o) ^1/2 uo. £o^-1/2 13 / 18 Which of the following has lowest wavelength in electro magnetic waves Microwave Ultraviolet X ray Y rays 14 / 18 The dimension formula of 1/uo.£o is.. L^3T^2 L^2T^-2 LT^-2 L^-1 T 15 / 18 The dimension formula for( 1/2 £o.E^2) is identical to that of B^3/uo Buo/2 B^2/2uo B/2uo 16 / 18 Until of displacement current is Am Am^-2 Ohm Joule 17 / 18 Electro magnetic waves in free space is Longitudinal Transverse Progressive None of these 18 / 18 Which ray is used for cooking and heating Infrared Ultraviolet Microwave None of these Your score isThe average score is 0% 0% Restart quiz
