a)
Time Constant
T=RC =(4*10^6)(2*10^-6)
T=8 sec
In a RC Circuit voltage as a function of time is given by
V=Vo[1-e-t/T]
V=16[1-e-5/8]
V=7.44 Volts
Voltage drop across resistor is
VR=16-7.44=8.56 Volts
b)
Time Constant
T=Req*C =[(4+7)*106](2*10-6]
T=22 sec
For discharging ,Voltage drop across both the resistors is
V=Voe-t/T
V=16*e-(1.8/22)
V=14.74 Volts
Voltage across R1 is
V1=V*(R1/R1+R2) =14.74*(4/4+7)
V1=5.36 Volts
For a long period of time the switch S is in position "b". At t =...
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