Question

suppose the electric field in some region is found to be e=kr^3 ( k is some constant)....

Answer 1

Explanation:

Electric field is directed along negative x-direction.

hence the direction of motion is along the negative y-direction.

(b)

From the given equation, k=1.8 rad/m

λ=2π/k=3.49

(c)

Frequency of wave is ν=ω/2π=8.6×10

7

=86 Mhz

(d)

For the given equation, E

o

=3.1N/C

B

o

=E

o

/c=1.03×10

−7

=103nT

(e)

Magnetic wave is directed along negative z-direction.

Thus, B=B

o

cos(ky+ωt)

k

^

⇒B=1.03×10

−7

cos(1.8y+5.4×10

6

t)

k

^