Digital Electronics - Multivibrators and 555 Timer - Discussion
Discussion Forum : Multivibrators and 555 Timer - General Questions (Q.No. 4)
4.
A 22-k
resistor and a 0.02-
F capacitor are connected in series to a 5-V source. How long will it take the capacitor to charge to 3.4 V?
resistor and a 0.02-F capacitor are connected in series to a 5-V source. How long will it take the capacitor to charge to 3.4 V?Discussion:
13 comments Page 1 of 2.
Uday Pratap Singh said:
9 years ago
Voltage across capacitor is,
Vc = V (1 - e^(-t/RC)).
From question Vc = 3.4V, V = 5V, RC = 0.44 x 10^-3.
Putting these values in above equation.
3.4 = 5 (1 - e^(-t/(0.44 * 10^(-3)))).
After solving this equation, t = 0.501 ms.
Vc = V (1 - e^(-t/RC)).
From question Vc = 3.4V, V = 5V, RC = 0.44 x 10^-3.
Putting these values in above equation.
3.4 = 5 (1 - e^(-t/(0.44 * 10^(-3)))).
After solving this equation, t = 0.501 ms.
(1)
Sujats said:
1 decade ago
I want to know how to solve this problem or formula for it.
Sakshi said:
1 decade ago
What is the formula to solve this problem.
Korsa taressa said:
1 decade ago
How the answer be 0.501 ms?
Shafeeq said:
1 decade ago
Use this formula V=Vm(1-exp(-t/R*C))
Here all values are given and solve for t.
Here all values are given and solve for t.
Arvind said:
1 decade ago
What is other formula without calculator for exam?
Ambree said:
1 decade ago
Wt is the formula to calculate with out calculator ?
Vikas Kaushik said:
1 decade ago
V = Vo [ {exp(-t/RC) }- 1]
where
V = voltage across capacitor at any time t
Vo = supply voltage
where
V = voltage across capacitor at any time t
Vo = supply voltage
K.K said:
1 decade ago
The charging of capacitor is calculated.
T= ln(3) *RC.
T= ln(3) *RC.
Viendong194 said:
1 decade ago
Yes. this is a monostable that made by IC555.
When Vc=2/3Vo , T=ln(3)*RC.
When Vc=2/3Vo , T=ln(3)*RC.
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