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diff --git a/863/CH4/EX4.3/Ex4_3.sce b/863/CH4/EX4.3/Ex4_3.sce
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+//Caption:Calculate Vce (a)Before input pulse is applied (b)at end of delay time (c)at end of turn on time (d)Total time 
+//Ex4.3
+clc;
+clear;
+close;
+Vcc=12//Collector voltage(in volts)
+Rc=3.3//Collector resistor(in Kilo ohm)
+pw=5//Pulse width of input voltage(in micro sec)
+Ix=50//Collector cutoff current(in nA)
+t=250//Switch off time(nA)
+Vce=Vcc-(Ix*Rc*10^(-6))
+disp(Vce,'(a)Collector emitter voltage before input pulse is applied(in volts)=')
+Vce2=Vcc-(0.1*Vcc)
+disp(Vce2,'(b)Collector emittter voltage at end of delay time(in volts)=')
+Vce3=Vcc-(0.9*Vcc)
+disp(Vce3,'(c)Collector emitter voltage at end of turn on time(in volts)=')
+T=(t*10^(-3))+pw
+disp(T,'(d)Total time from commencement of input to transistor switch off(in micro sec)=')
+\ No newline at end of file