Consider a $300 \; \Omega$, quarter-wave long (at $1 \; \mathrm{GHz}$ ) transmission line as shown in the figure. It is connected to a $10 \mathrm{~V}, 50 \; \Omega$ 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
- $10 \mathrm{~V}$
- $5 \mathrm{~V}$
- $60 \mathrm{~V}$
- $60 / 7 \mathrm{~V}$