Question
The critical frequency of Flayer is $50 \mathrm{MHz}$ when angle of incidence is $74^{\circ}$. What is the maximum unable frequency?(A) $181.5 \mathrm{MHz}$(B) $191.5 \mathrm{MHz}$(C) $199.5 \mathrm{MHz}$(D) $171.5 \mathrm{MHz}$
Step 1
Step 1: We know that the critical frequency (fc) is given by the formula: \[f_c = \frac{f}{\sin(i)}\] where \(f\) is the maximum usable frequency and \(i\) is the angle of incidence. Show more…
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Maximum usable frequency (MUF) infregion layer is $x$. When the critical frequency is $60 \mathrm{MHz}$ and the angle of incidence is $70^{\circ}$, then $n$ is (a) $140 \mathrm{MHz}$ (b) $175 \mathrm{MHz}$ (c) $180 \mathrm{MHz}$ (d) $160 \mathrm{MHz}$
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Round 2
Maximum usable frequency (MUF) in $F$ -region layer is $x$, when the critical frequency is $60 \mathrm{MHz}$ and the angle of incidence is $70^{\circ}$. Then $x$ is (a) $150 \mathrm{MHz}$ (b) $170 \mathrm{MHz}$ (c) $175 \mathrm{MHz}$ (d) $190 \mathrm{MHz}$
Maximum useable frequency (MUF) in F-region layer is x, when the critical frequency is 60 MHz and the angle of incidence is 70°. Then x is (a) 150 MHz (b) 170 MHz (c) 175 MHz (d) 190 MHz
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