resistance in circuits?

Question

folks,
what is the role of resistance in circuits? for example in logic gates, fet, clipper we use resistance, if resistance is meant for resisting the current how do we get output. my question may sound foolish, but please make me understand the role of resistance in electronic circuits.
one more thing in logic gates also we use resistance but we get the output. how is it possible if resistance obstructs current

Answer 1

Resistance doesn't stop current, it RESISTS current. Eventually if you have enough resistance then, yes, you will stop current flow.
Voltage is the "push" that drives current through resistance. You can get current to go through any amount of resistance if you have enough "push". For example; if you apply enough voltage to a stick eventually current will flow and you'll have a burning stick to deal with. So they all three go hand in hand each being as important as the next. To sum it up, resistance simply controls current to an acceptable level and stops those logic gates and FET's you spoke of from getting too hot and meeting the same fate as the stick we mentioned earlier.

Answer 2

Controlled resistance is use to create voltage. E=I x R. Resistance is used to create a voltage drop from Vcc . Usually Vcc is 12 vdc and the voltage on the flip-flop is 5 vdc. Its allot to explain in one short answer.

Answer 3

E = I R ....

Without Resistance there is no current, resistance provides a load and defines our limits.