Multiple choice

Consider a 300 $\Omega$, quarter - wave long (at 1 GHz) transmission line as shown in figure. It is connected to a 10 V, 50 $\Omega$ source at one end and is left open circuited at the other end. The magnitude of the voltage at the open circuit end of the line is

  1. 10 V

  2. 5 V

  3. 60 V

  4. 60/7 V
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C Correct answer
Explanation

$ \dfrac{V_L}{V_{in}} = \dfrac{Z_O}{Z-{in}} \\ or \qquad V_L = \dfrac{Z_O}{Z_{in}} V_{in} = \dfrac{10 \times 300} {50} = 60V

$

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