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10 Question-Answer on displacement current  1.        The displacement current was first postulated by: (a)     Maxwell (b)    Marconi (c)     Ampere (d)    Hertz Ans: ( a) 2.        Which of the following type of radiations are radiated by an oscillating electric charge (a)     Electric (b)    Magnetic (c)     Thermoelectric (d)    Electromagnetic Ans: ( d) 3.        The theory of electromagnetic waves predict-ted by Maxwell in 1888 was confirmed experimentally first by (a)     Maxwell (b)    Hertz (c)     Marconi (d)    J.C. Bose. Ans: ( b) 4.        The electromagnetic waves (a)     Travel with the speed of sound (b)    Travel with the same speed in ...