Digital Electronics - Multivibrators and 555 Timer - Discussion

Discussion :: Multivibrators and 555 Timer - General Questions (Q.No.31)


A 0.3-F capacitor has an initial charge of 2.7 V. If it is discharged through a 10-k resistor for 6.5 ms, how much voltage will be left across the capacitor?

[A]. 0.0 V
[B]. 0.309 V
[C]. 2.7 V
[D]. 2.295 V

Answer: Option B


No answer description available for this question.

Priya said: (Dec 2, 2011)  
The voltage formula is given as Vc = V(1 - e-t/RC)
which equals: Vc = 2.7(1-e-.0065/.003) [RC = .003 seconds from above] Therefore, Vc = 2.39 volts
voltage will be left across the capacitor is 2.7V-2.39V=0.31V

Anjana said: (Nov 14, 2016)  
Correct @Priya.

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