V(t) Vc −1+ = (1 - e ¹/RC) -(e-t/RC) Ln(1-V(t)) = ¹/RC Vc V(t) Vc C = = C= -t/(R (Ln(1 – V(!))) Vc -t R(Ln(1 – V(t))

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter19: Capacitors
Section: Chapter Questions
Problem 3PA: You find that a 25-F capacitor connected to 480 VAC is defective. The storeroom has no capacitors...
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Use equations from picture to solve with work.

V(t)
Vc
−1+
= (1 − e¯¹/Rc)
-
C =
V (t)
Vc
Ln(1-
C= -t/(R
=
- (e-t/RC)
V(t)) = ¹/RC
Vc
(Ln(1-(t)))
Vc
-t
R(Ln(1 V(t))
Transcribed Image Text:V(t) Vc −1+ = (1 − e¯¹/Rc) - C = V (t) Vc Ln(1- C= -t/(R = - (e-t/RC) V(t)) = ¹/RC Vc (Ln(1-(t))) Vc -t R(Ln(1 V(t))
Question 5: If you wanted to insert a delay in a circuit of 1 ms and you had a 1k resistor, what capacitor would you
choose, assuming that the Voltage threshold of the circuit you were connecting to is 50% the 5V supply voltage.
Answer: 1.44 uF
Transcribed Image Text:Question 5: If you wanted to insert a delay in a circuit of 1 ms and you had a 1k resistor, what capacitor would you choose, assuming that the Voltage threshold of the circuit you were connecting to is 50% the 5V supply voltage. Answer: 1.44 uF
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