What is the peak strength of the Electric Field

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zoomba91210
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In an EM wave traveling west, the B field oscillates vertically and has a frequency
of 80.0kHz and an rms strength of 7.75 × 10−9T. What is the peak strength of the Electric Field.


So I worked this problem and got it wrong earlier and am looking for explanation as to why.

To Solve this problem, you would multiply the rms strength by 3.00 x 10^8 m/s right?



Thanks!
 
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