Electronics - Capacitors - Discussion

46. 

How long would it take the capacitor in the given circuit to completely charge if the switch was in position 1?

[A]. 22 ms
[B]. 69 ms
[C]. 345 ms
[D]. 440 ms

Answer: Option C

Explanation:

No answer description available for this question.

Vasu said: (Sep 27, 2011)  
T= rc
= (4.7 +2.2) *10 ^3 ohms * (10* 10^-6 Farad)
= 69 mill sec

But the time required for capacitor to fully charge is 5T.

So 5*69 milli sec= 345 mSec.

Paavai said: (Dec 2, 2013)  
Why time required for capacitor to full charge is 5T?

Shweta said: (Jan 23, 2014)  
Why time required for capacitor to full charge is 5T.

Hiren said: (Jul 9, 2014)  
Capacitor is fully charged when 5 times constant occurs.

So 5T is taken.

Keshav said: (Aug 28, 2015)  
Can you please elaborate how 5T is taken?

Junex said: (Feb 27, 2017)  
If the switch was in position 1 then it should be in position 2 during discharging.

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