27. Consider the circuit shown below. (A) Redraw the circuit step by step until only a single equivalent capacitor remains. Label each reduced capacitor using a symbol with subscripts. 24.0 nF 18.0 nF 12 V I. 36.0 nF 24.0 nF 15.0 nF 12.0 nF 6.0 nF (B) Determine the equivalent capacitance of the circuit

27. Consider the circuit shown below. (A) Redraw the circuit step by step until only a single equivalent capacitor remains. Label each reduced capacitor using a symbol with subscripts. 24.0 nF 18.0 nF 12 V I. 36.0 nF 24.0 nF 15.0 nF 12.0 nF 6.0 nF (B) Determine the equivalent capacitance of the circuit

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter21: Circuits And Dc Instruments

Section: Chapter Questions

Problem 64PE: A heart pacemaker fires 72 times a minute, each time a 25.0 nF capacitor is charged (by a battery in...

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A heart pacemaker fires 72 times a minute, each time a 25.0 nF capacitor is charged (by a battery in series with a resistor) to 0.632 of its full voltage. What is the value of the resistance?
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According to its design specification, the timer circuit delaying the closing of an elevator door is to have a capacitance of 32.0 F between two points A and B. When one circuit is being constructed, the inexpensive but durable capacitor installed between these two points is found to have capacitance 34.8 F. To meet the specification, one additional capacitor can be placed between the two points, (a) Should it be in series or in parallel with the 34.8-F capacitor? (b) What should be its capacitance? (c) What If? The next circuit comes down the assembly line with capacitance 29.8 F between A and B. To meet the specification, what additional capacitor should be installed in series or in parallel in that circuit?
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In places such as hospital operating rooms or factories for electronic circuit boards, electric sparks must be avoided. A prison standing on a grounded floor and touching nothing else can typically have a body capacitance of 150 pF, in parallel with a foot capacitance of 80.0 pF produced by the dielectric soles of his or her shoes. The person acquires static electric charge from interactions with Ills or her surroundings. The static charge flows to ground through the equivalent resistance of the two shoe soles in parallel with each other. A pair of rubber-soled street shoes can present an equivalent resistance of 5.00 103 M. A pair of shoes with special static-dissipative soles can have an equivalent resistance of 1.00 M. Consider the persons body and shoes as forming an RC circuit with the ground. (a) How long does it take the rubber-soled shoes to reduce a persons potential from 3.00 103 V to 100? (b) How long does it take the static-dissipative shoes to do the same thing?
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