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Unformatted text preview: q is a maximum, so the current is zero. i = 0 A c) After one period, everything is the same as at t = 0. i = 0 A g) The induced emf will oppose the increase of current. 2. a) 1 m 0.020 2 2 so , 2-= = = λ k k = 100 m b) 2 s 10 6 2 1 6-× = = f f = 3.0 ×10 6 Hz = 3.0 MHz c) Negative x direction The + sign before the t term means it is going in the – direction. d) B must be along the y direction, perpendicular to the direction of propagation, and E . To move in the – x direction it must be of the form B = + B m sin ( kx + t ) y ˆ k and are the same as for the electric field, so only B m is needed. T 10 . 1 m/s 10 3.0 V/m . 3 8 8-× = × = = c E B m m . Then, B = (1.0 ×10-8 T) sin [(0.020 π m-1 ) x + (6.0 π ×10 6 s-1 ) t ] y ˆ...
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