Electronics - Capacitors - Discussion

Discussion Forum : Capacitors - General Questions (Q.No. 35)
35.

How long would it take the capacitor in the given circuit to completely discharge if the switch was in position 2?

22 ms
69 ms
345 ms
420 ms
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
18 comments Page 2 of 2.

Hima said:   9 years ago
RC = (6.2 + 2.2) * 1000 * 10^-6 is equal to 8.4ms.

Then to completely discharge 5 time constants.
= 5RC.
= 8.4 * 5 = 42 ms.

So I agree with you @ Kiran.

Naveen G said:   9 years ago
@Kiran and @Hima.

You guys substituted C = 1x10^-6 F, instead 10x10^-6 F(As given in the question).

So your answer is 42 ms (wrong), instead 420 ms (Correct).

Shadan said:   8 years ago
Why we multiply by 1000?

Manikandan said:   8 years ago
Why Mulitply of 1000 here?

Decim said:   8 years ago
@Manikandaan and @Shadan

That 1000 is for the computation of total resistance,
(6.2+2.2)*1000= 8400 &Ohm;

Girish kulkarni said:   8 years ago
Why here resistance added, here in fig resistance are connected in parallel know then? Please explain.

Lex said:   7 years ago
@All.

In the circuit, R2 and R3 are in kilo ohms. That's why there is *1000.

YASHAWANTH M said:   7 years ago
Why you multiple with 5 times?


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