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Textbook Problem

A charged capacitor is connected to a resistor and switch as in Figure P28.45. The circuit has a time constant of 1.50 s. Soon after the switch is closed, the charge on the capacitor is 75.0% of its initial charge. (a) Find the time interval required for the capacitor to reach this charge. (b) If R = 250 kΩ, what is the value of C?

Chapter 28, Problem 28.45P, A charged capacitor is connected to a resistor and switch as in Figure P28.45. The circuit has a

 

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Priyanka
PriyankaLv10
25 Nov 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

In Figure P27.47, suppose the switch has been closed for a time interval sufficiently long for the capacitor to become fully charged. Find (a) the steady-state current in each resistor and (b) the charge on the capacitor. (c) The switch is now opened at . Write an equation for the current in as a function of time and (d) find the time interval required for the charge on the capacitor to fall to one-fifth its initial value.

 

A charge Q is placed on a capacitor of capacitance C. The capacitor is connected into the circuit shown in Figure P26.37, with an open switch, a resistor, an initially uncharged capacitor of capacitance 3C. The switch is then closed, and the circuit comes to equilibrium. In terms of Q and C, find (a) the final potential difference between the plates of each capacitor, (b) the charge on each capacitor, and (c) the finals energy stored in each capacitor. (d) Find the internal energy appearing in the resistor. 

The circuit shown above includes a switch S, which can be closed toconnect the 3-microfarad capacitor in parallel with the 10-ohmresistor or opened to disconnect the capacitor from thecircuit.

http://img88.imageshack.us/my.php?image=physicsxt0.jpg

Case I. Switch S is open. The capacitor is not connected. Underthese conditions determine:
a) The current in the battery
b) the current in the 10-ohm resistor
c) the potential difference across the 10-ohm resistor

Case II. Switch S is closed. The capacitor is connected. After sometime, the currents reach constant values. Under these conditionsdetermine:
d) The charge on the capacitor
e) The energy stored in the capacitor

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