Large capacitors can hold a potentially dangerous charge long after a circuit has been turned off, so it is important to make sure they are discharged before you touch them. Suppose a 120 μF capacitor from a camera flash unit retains a voltage of 200 V when an unwary student removes it from the camera Part A If the student accidentally touches the two terminals with his hands, and if the resistance of his body between his hands is 1.8 kf2, for how long will the current across his chest exceed the danger level of 50 mA? Express your answer with the appropriate units. HÅ ?

University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
Publisher:OpenStax
Chapter10: Direct-current Circuits
Section: Chapter Questions
Problem 69AP: Consider the circuit below. The battery has an emf of = 30.00 V and an internal resistance of r =...
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Large capacitors can hold a potentially dangerous
charge long after a circuit has been turned off, so it
is important to make sure they are discharged
before you touch them. Suppose a 120 F
capacitor from a camera flash unit retains a voltage
of 200 V when an unwary student removes it from
the camera.
Part A
If the student accidentally touches the two terminals with his hands, and if the resistance of his body between his hands is
1.8 k12, for how long will the current across his chest exceed the danger level of 50 mA?
Express your answer with the appropriate units.
HÅ
Value
Submit
Request Answer
Units
?
Transcribed Image Text:Large capacitors can hold a potentially dangerous charge long after a circuit has been turned off, so it is important to make sure they are discharged before you touch them. Suppose a 120 F capacitor from a camera flash unit retains a voltage of 200 V when an unwary student removes it from the camera. Part A If the student accidentally touches the two terminals with his hands, and if the resistance of his body between his hands is 1.8 k12, for how long will the current across his chest exceed the danger level of 50 mA? Express your answer with the appropriate units. HÅ Value Submit Request Answer Units ?
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