Question
A input is supplied to a transformer. The output circuit draws a current of at . If the efficiency of the transformer is , the current drawn by the primery winding of the transformer is
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Question 2
In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of and amplitude .
(a) What is the wavelength of the wave?
(b) What is the amplitude of the oscillating magnetic field?
(c) Show that the average energy density of the E field equals the average energy density of the B field. [c = 3 ]
Question Text | A input is supplied to a transformer. The output circuit draws a current of at . If the efficiency of the transformer is , the current drawn by the primery winding of the transformer is |