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Prob 11-26 Fig 11-53 solved

Prob 11-26 Fig 11-53 solved - constant The equation for vc...

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Prob 11-26 Fig 11-53 The initial voltage on the capacitor is 55 V. The switch is closed at t = 0 s and opened 1 s later.  Sketch vc. What is the capacitor’s voltage at t = 3.25 s. vc starts at 55 V and discharges toward 0 V. At t = 1 s the discharge stops and vc remains 
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Unformatted text preview: constant. The equation for vc is vc = 55e-t/ τ τ = RC = 25E3*20E-6 = 500E-3 = 0.5 s So vc = 55e-t/0.5 = 55e-2t V; at t = 1 s, vc = 55e —2*1 = 55e-2 = 55*0.135 = 7.44 V At t = 3.25 s, vc = 7.44 V...
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