The electric field of an electromagnetic wave propogating in air is givenby E(z, t) = (4 cos ((6 × 108 rad/s)t − (2 m−1)z)ˆx+ 3 sin ((6 × 108 rad/s)t − (2 m−1)z)ˆy) V/m.Find the associated magnetic field H(z, t).  Hello. I am getting stuck on the cross product portion of this problem. Could you help me out? Thank you for the time and effort!

The magnetic field of a wave propagating through a certain nonmagnetic material in the negative z direction has an amplitude of 45mA/m and a frequency of 10° Hz. If the wave is polarized on the positive x direction and the phase velocity of the wave is 10°m/s. Assume the initial phase is 30°. Find the wave number. Select one: O a. The wave number is: 67 O b. The wave number is: 2T O c. The wave number is: 2.5 O d. The wave number is: 7.6

Please answer quickly The angular frequency of waveform having a period of 1 msec is 2pi radians/sec.       True       False   Root mode square value of a signal is same as the effective value of a signal.  True  False   The magnetic field energy stored in between the plates of the capacitor is mathematically equal to the half of the product of its capacitance and the square of the voltage across the capacitor.  True  False

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