The electrical device whose symbol is show above (circle) requires a terminal voltage of 12 volts and current of 2 amperes for proper opeation.

a) using only this device and one or more 3-ohm resistors design a circuit so that the device will opeate properly when the circuit is connected across a bettery of emf 24 volts and negligible internal resistance. Draw the circuit using the symbol for the device and the appropriate symbol for each 3-ohm resistor.

b) Using only this device and one or more 3-ohm resistors, design a circuit so that the device will operate properly when connected to a source that supplies a fixed current of 5 amperes. Draw the circuit using the symbol for the device and the appropriate symbol.

c) Calculate the power dissipation in each 3-oh resistor used in the circuit in part b.