The figure below shows how a bleeder resistor (R = 246 kΩ) is used to discharge a capacitor (C = 77.7 µF) after an electronic device is shut off, allowing a person to work on the electronics with less risk of shock. (a) What is the time constant? (in s) (b) How long will it take to reduce the voltage on the capacitor to 0.100% of its full value once discharge begins? (in s) (c) If the capacitor is charged to a voltage V0 through a 123 Ω
The figure below shows how a bleeder resistor (R = 246 kΩ) is used to discharge a capacitor (C = 77.7 µF) after an electronic device is shut off, allowing a person to work on the electronics with less risk of shock. (a) What is the time constant? (in s) (b) How long will it take to reduce the voltage on the capacitor to 0.100% of its full value once discharge begins? (in s) (c) If the capacitor is charged to a voltage V0 through a 123 Ω
Chapter8: Electromagnetism And Em Waves
Section: Chapter Questions
Problem 26Q
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The figure below shows how a bleeder resistor (R = 246 kΩ) is used to discharge a capacitor (C = 77.7 µF) after an electronic device is shut off, allowing a person to work on the electronics with less risk of shock.
(a) What is the time constant?
(in s)
(b) How long will it take to reduce the voltage on the capacitor to 0.100% of its full value once discharge begins?
(in s)
(c) If the capacitor is charged to a voltage V0 through a 123 Ω resistance, calculate the time it takes to rise to 0.865V0 (this is about two time constants).
(in s)
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