First slide

Nature of electromagnetic wave

Question

The magnetic field in the plane electromagnetic wave is given by $B_{Z} = 2 x 10^{- 7} \sin (0.5 x 10^{3} x + 1.5 x 10^{11} t)$ .The expression for electric field will be

Moderate

A

$E_{Z} = 30 \sqrt{2} \sin (0.5 x 10^{3} x + 1.5 x 10^{11} t) V / m$
B

$E_{Z} = 60 \sin (0.5 x 10^{3} x + 1.5 x 10^{11} t) V / m$
C

$E_{Y} = 30 \sqrt{2} \sin (0.5 x 10^{3} x + 1.5 x 10^{11} t) V / m$
D

$E_{Y} = 60 \sin (0.5 x 10^{3} x + 1.5 x 10^{11} t) V / m$

Solution

$\frac{E}{B} = c a n d E s h o u l d b e p e r p e n d i c u l a r t o B e = c B = 3 x 10^{8} x 2 x 10^{- 7} = 60$

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