Question

An electronic engineer needs a particular value of capacitance for his new design for the car courtesy light to dim at a particular rate when the car is locked remotely using a wireless key.
He needs a capacitance of exactly 12 µF. Which of the four possibilities will give him that value?


1.Two capacitors in parallel, each of value 24 µF

2.Two capacitors in series, one of value 4 µF and the other of value 2 µF.

3.Two capacitors in series, each of value 6 µF

4.Two capacitors in parallel, each of value 6 µF