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.

When the diac has turned on, the voltage drop across its terminals is breakover voltage required to fire it. the same as O greater than O less than the

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