Assignment:
In the circuit shown in the picture E=10V, r=1ohm, R1=2khom, and R2=R3=R4=3kohm.
1. What is the current at point a of the circuit?
2. What is the potential difference between points a and b?
3. What is the potential difference between points b and d?
4. What is the current at point c?
5.)What is the potential difference between points c and b.
Provide complete and step by step solution for the question, use formulas.