(Solved): Q1- In the circuit of figure \( (1) ; R_{2}=2.50(\mathrm{k} \Omega), R_{3}=1.80(\mathrm{k} \Omega) ...

Q1- In the circuit of figure \( (1) ; R_{2}=2.50(\mathrm{k} \Omega), R_{3}=1.80(\mathrm{k} \Omega) \) and \( E=3.25(\mathrm{~V}) \). Find: - Thévenin's equivalent external to \( \mathrm{R} 1 \). - The voltage across \( R_{1} \) when \( R_{1}=50.0(\Omega) \) (use Thévenin's equivalent obtained in the step above) Figure 1