Circuit Help 19. the the circuit as shown, C 6.00uF, E 100V, and R 5002. After h
ID: 3899026 • Letter: C
Question
Circuit Help
19. the the circuit as shown, C 6.00uF, E 100V, and R 5002. After having been at contact a for a long time, the switch throw is rotated to contact b (a) What is the charge on the upper plate of the capacitor just as the switch throw is moved to contact b (b) What is the current just after the switch throw is rotated to contact b (c) What is the time constant of this circuit? (d How much charge is on the upper plate of the capacitor 6.00ms after the switch throw is rotated to contact b?Explanation / Answer
a)
Charge= c*v
=6*100
=600 micro coulomb
b)
voltage across capacitor=100 V
Current = 100/R=100/500= 0.2 A
C)
time constant= RC=500 *6=3000 MICRO SECONDS
= 3 ms (milli seconds)
d)
use discahrging equation
Q=Qo*e^(-t/time constant)
=600*e^(-6/3)
=81.2 micro coulomb