Three resistors (R1 = 10 Ω, R2 = 4 Ω, and R3 = 8 Ω) are connected to two batteries (of negligible internal resistance) as shown.
What is the current through resistor R2?
What is the current through R3?
What is the electric power supplied by the 12 V battery?
What is the electrical power dissipated through resistor R1?
E2 = 12 V
E1 = 20 V