and the potenuai dimer- ence across each capacitor? NT is charged to 10 in an RC
ID: 1409966 • Letter: A
Question
and the potenuai dimer- ence across each capacitor? NT is charged to 10 in an RC circuit with a time constant of 15 ms what time V.The capacitor begins to discharge at t 0 s. half its will the charge on the capacitor reduced to initial value? b At what time will the energy stored in the capacitor be reduced to half its initial value? The capacitor in Figure P23.72 is initially uncharged and the 12, ll switch, in position c, is not connected to either side of the cir- cuit. The switch is now flipped to position a for 10 ms, then to position b for 10 ms, and then brought back to position c. What is the final potential difference across the capacitor? 150 c 150 n 12 V 40 F FIGURE P23.72 73. ll hat value resistor will discharge a 1.00 AuF capacitor to 10% of its initial charge in 2.0 ms? camera uses a /4. The charging circuit for the flash system of a power supply. 100 uF that from a 250 V capaci- What is the most resistance can be series with the voltage in tor if the capacitor is to charge to at least 87% of its final in no more than 8.0 s? 100 n The dis- A through a value in 2.5 ms charge current decreases to 25% of its initial 75. ll to 30 V is discharged il ji the value of the capacitorExplanation / Answer
71) a) Here, 1/2 = e(-t/15)
=> time , t = 10.397 ms
b) Here, 0.7071 = e(-t/15)
=> time , t = 5.198 ms
72) Here, Initial potential difference after 10 ms = 12 * ( 1 - e -10/6)
= 9.733 V
Final potential difference after 10 ms = 9.733 * ( e -10/6)
= 1.838 V
73) Here, 0.10 = e-2000/R
=> R = 868.6 ohm
74) Here, 0.87 = 1 - e-80000/R
=> R = 39211.44 ohm
75) Here, 0.25 = e-2.5 * 10-5/C
=> C = 18.033 microF
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.