Questions
The intensity of TV broad cast station of E = 800 Sin (109 t - k x) V/m is ......... and the wave length in meter is ..............
a
850 Wm-2 ; 0.6 π
b
425 Wm-2 ; 0.6 π
c
850 Wm-2 ; 0.3 π
d
425 Wm-2 ; 0.3 π
detailed solution
Correct option is A
E=800 sin109t-kx Vm-1I=uavg x C =12ε0E02 x C =12 x 8.85 x 10-12 x 8002 x 3 x 108 =849.6 ≈850 Wm-2ω=109, 2πn=109 , n=1092π ; C=nλλ=Cn=3 x 108109 x 2π ; λ=0.6π mTalk to our academic expert!
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