Question

an electromagnetic wave is denoted by E=100Exp8piei(10^14t-10^3y)V/m along x axiss. Find the direction of propagation of the wave, speed of the wave and magnetic flux density​

Answer 1

Answer:

As given:

E= 10cos(10

7

t+kx)

Comparing it with standard equation of e.m. wave,

E= E

0

cos(ωt+kx)

Amplitude, E

0

=10 V/m and ω=10

7

rad/s

∵c=vλ=

2π

ωλ

or λ=

ω

2πc

=

10

7

2π×3×10

8

=188.4 m

Also,

c=

k

ω

or k=

c

ω

=

3×10

8

10

7

= 0.033