# Series connected capacitor and resistor [closed]

I want to ask something that I see in the circuit. As follows, What is the purpose of using 2R resistor in this circuit?

## closed as unclear what you're asking by Andy aka, Chupacabras, Voltage Spike, RoyC, Dave Tweed♦Jan 14 '18 at 13:30

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• Replaced comment with answer below. – Nedd Jan 12 '18 at 6:17
• Add whole circuit to your question, please. Not just a small section. – Chupacabras Jan 12 '18 at 6:34
• Your question is unclear. Are asking what is purpose of resistor in this RC circuit? Or are you asking what is the meaning of "2R" value? – Chupacabras Jan 12 '18 at 6:36

## 2 Answers

It is simple RC circuit. The resistor slows down charging of the capacitor.

• But 2R is too small, is not it? – Onur Bayrak Jan 12 '18 at 6:26
• @OnurBayrak That is another question! You have asked what is purpose of that resistor, haven't you? – Chupacabras Jan 12 '18 at 6:33
• Yes, I said that – Onur Bayrak Jan 12 '18 at 6:42
• @OnurBayrak Then my answer is exactly about that. – Chupacabras Jan 12 '18 at 7:01

Typically the marking of 2R for that resistor would tell you that the value of that resistor should be 2 times the value of a similar (or referenced) resistor marked only as R somewhere else in the circuit.

• OK, two ways of looking at this. Did you want to know what is the purpose of the using the designation "2R" ? Or were you asking what is the function of the resistor marked as 2R? – Nedd Jan 12 '18 at 6:27
• What is the function of the resistor marked as 2R? – Onur Bayrak Jan 12 '18 at 6:44
• OK, so the answer from Chupacabras is more fitting. But from your other comment don't assume 2R means 2 Ohms. – Nedd Jan 12 '18 at 7:35
• I have never seen that as a convention, typically in the circuits I have seen, 2R would be a 2 ohm resistor, similar 2K would be 2000 ohms and 2M would be 2000000 ohms. – Colin Jan 12 '18 at 9:34