This process continues as long as there is an electric current behind the capacitor. We can have power running through a circ uit even if the power source has been removed because the capacitor provides this charge. Radios, televisions, computers and printers use capacitors to store charge. A transistor is used to allow current to flow along one path. A transistor can tell which way the current is flowing and make decisions or add numbers.
Resistors reduce the flow of a charge.
Since some electronic components are very delicate, they can only have a little bit of charge flow through them. Resistors help solve the problem of voltage pressure by policing the processes. Inductors act like res istors at certain frequencies. They are neither conductors nor insulators but somewhere in between. Build a simple parallel circuit.