1990B3. A battery with an emf of 24 volts and an internal resistance of 1 ohm is connected to an external circuit as shown above. Determine each of the following:
a. the equivalent resistance of the combination of the 4 -ohm, 8 -ohm, and 12 -ohm resistors
b. the current in the 5-ohm resistor
c. the terminal voltage, VAC of the battery
d. the rate at which energy is dissipated in the 12 -ohm resistor
e. the magnitude of the potential difference VBC
f. the power delivered by the battery to the external circuit