8.3 At a distance of 1 km from a 1 MHz radio transmitter the daytime field strength is 200 mV/m. Calculate the field strength 110 km from the transmitter if the ground-wave attenuation is 9 dB greater than the free-space loss. Also calculate the field strength at the same point during the night when there is also a sky wave received. Assume the sky wave to be reflected from a height of 120 km and that the earth is flat.

E = = 50 V Z60° Load 1 Load 2 50 VAR (L) 100 W 100 VAR (L) 200 W Load 3 200 VAR (C) OW Load 4 400 VAR (C) 50 W

3-Determine the output voltage in Figure 8 for each of the following failure modes: (a) L1 open (b) L2 open (c) R1 open (d) a short across R2 5 V 1 MHz L₁ m 8.0 μΗ L₂ m 4.0 με Figure 8 R₁ ww 100 (2 R₂ 100 Ω R3 56 Ω

20 of 20 What is the expected voltage drop across each load in this circuit? O 6 V and 6 V 11.99 V and 0.01 V O 12 V and 12 V O 0.01 V and 11.99 V 12 V 12 V O 10 Q e 90 D 10,000 Q D