Question

number 9 please

potential difference UI JU.U has none. The switches are then closed simultaneously, a. FHU the final charge on each capacitor after a long time has passed. b. Calculate the percentage of the initial stored energy that was lost when the switches were closed. C = 5.00 uF C = 20.0 uF 50.0 V FIGURE P27.7 8. N A capacitor has a charge of 3.587 nC and a potential differ- ence of 5.00 V. a. How much energy is stored in the capacitor? b. What is its capacitance? 9. NA 4.50-uF capacitor is connected to a battery for a long time. a. If the voltage of the battery is 9.00 V, how much energy is stored in the capacitor? b. If the voltage of the battery is increased to 24.0 V, how much energy is now stored in the capacitor? 10. G CASE STUDY Students work- V (V) h (cm) ing in a physics lab use a Thomp- son coil to launch a light ring (m 0.00 = 25.0 g) in much the same way 0.32 as the experimenters in the case study. The students vary the potential difference across their 5.8 capacitor bank and measure the 9.9 maximum height of the ring. 50 Their data are shown in the 16.2 table to the right. Plot these data 21.2 to find the capacitance of their 29.3 capacitor bank. 80 2.7

Answer 1

@ @ formula for energy stored in capacetor = cv2 u=à (4:5*20*C) (9)218a X10 45 v= $(4:5X106) (24)2= [ 1-29 X10-35 0