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Electromagnetic Field Theory

Basics of Vector Calculus

Quick practice

Question 1 of 5

A monochromatic plane electromagnetic wave travels in vacuum in the positive X direction (x, y, z system of coordinates). The electric and magnetic fields can be expressed as                                                                                                                          [1995]

A

E(x, t)=E_{0} \cos (k x-\omega t) \bar{a}_{y} \\\\ H(x, t)=-H_{0} \cos \left(k x-\omega t-\frac{\pi}{2}\right) \bar{a}_{z}

B

E(x, t)=E_{0} \cos (k x-\omega t) \bar{a}_{y} \\\\ H(x, t)=H_{0} \cos (k x-\omega t) \bar{a}_{z}

C

E(x, t)=E_{0} \cos (k x-\omega t) \bar{a}_{y} \\\\ H(x, t)=H_{0} \cos \left(k x-\omega t-\frac{\pi}{2}\right) \bar{a}_{z}

D

E(x, t)=E_{0} \cos (k x-\omega t) \bar{a}_{y} \\\\ H(x, t)=-H_{0} \cos (k x-\omega t) \bar{a}_{z}

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